UNITED STATES SECURITIES AND EXCHANGE COMMISSION Washington, D.C. 20549 FORM 8-K CURRENT REPORT Pursuant to Section 13 or 15(d) of the Securities Exchange Act of 1934 Date of Report (Date of earliest event reported): ~~December~~January 2725, ~~2004~~2005 (Date of earliest event reported) Greenwich Capital Acceptance, Inc., (as depositor, under the Trust Agreement, dated as October 1, 2003, providing for the issuance of Washington Mutual Mortgage Trust Mortgage Pass-Through Certificates, Series 2003-R1) (Exact name of Registrant as specified in its Charter) DELAWARE (State or Other Jurisdiction of Incorporation) 333-108195-05 06-1199884 (Commission File Number) (I.R.S. Employer Identification No.) 600 Steamboat Road Greenwich, Connecticut 06830 (Address of principal executive offices) (Zip Code) Registrant's Telephone Number, Including Area Code: (203) 662-2700 (Former name or former address, if changed since last report.) Check the appropriate box below if the Form 8-K filing is intended to simultaneously satisfy the filing obligation of the registrant under any of the following provisions (see General Instruction A.2. below): [ ] Written communications pursuant to Rule 425 under the Securities Act (17 CFR 230.425) [ ] Soliciting material pursuant to Rule 14a-12(b) under the Exchange Act (17 CFR 240.14a-12(b)) [ ] Pre-commencement communications pursuant to Rule 14d-2(b) under the Exchange Act (17 CFR 240.14d-2(b)) [ ] Pre-commencement communications pursuant to Rule 13e-4(c) under the Exchange Act (17 CFR 240.13e-4(c)) Item 8.01 Other Events. This current report on Form 8-K relates to the monthly distribution reported to the holders of Washington Mutual Mortgage Trust Mortgage Pass-Through Certificates, Series 2003-R1, which was made on October 1, 2003 Item 9.01 Financial Statements and Exhibits. (c) Exhibits Exhibit No. Description 99.1 Monthly Remittance Statement to the Certificateholders dated as of ~~December~~January 2725, ~~2004~~2005. SIGNATURES Pursuant to the requirements of the Securities Exchange Act of 1934, the Registrant has duly caused this report to be signed on behalf of the Registrant by the undersigned thereunto duly authorized. DEUTSCHE BANK NATIONAL TRUST COMPANY, IN ITS CAPACITY AS TRUSTEE UNDER THE TRUST AGREEMENT ON BEHALF OF GREENWICH CAPITAL ACCEPTANCE, INC., REGISTRANT Date: ~~Dec~~Jan 27, ~~2004~~2005 By: /s/ Katherine M. Wannenmacher Katherine M. Wannenmacher Vice President EXHIBIT INDEX DOCUMENT 99.1 Monthly Remittance Statement to the Certificateholders dated as of ~~December~~January 2725, ~~2004~~2005.

Washington Mutual 2000-1

Mortgage Pass-Through Certificates

December 27, 2004 Distribution

January 25, 2005 Distribution

Contents

TABLE OF CONTENTS

Page

Contents

Certificate Payment Report

Collection Account Report

Credit Enhancement Report

Collateral Report

Delinquency Report

REO Report

Prepayment Report

Realized Loss Report

10.

Realized Loss Detail Report

11.

Additional Certificate Report

Total Number of Pages

CONTACTS

Administrator:

Direct Phone Number:

Address: Deutsche Bank

1761 E. St. Andrew Place, Santa Ana, CA 92705

Web Site: https://www.tss.db.com/invr

Factor Information: (800) 735-7777

Main Phone Number: (714) 247-6000

ISSUANCE INFORMATION

Seller:

Washington Mutual Bank

Cut-Off Date: March 1, 2000

Certificate Insurer(s):

Closing Date: March 31, 2000

First Payment Date: April 25, 2000

Servicer(s):

Washington Mutual Master Servicer

Distribution Date: December 27, 2004

Distribution Date: January 25, 2005

Underwriter(s):

Lehman Brothers Underwriter

Record Date: ~~December~~January 24, ~~2004~~2005

November 30, 2004

December 31, 2004

Page 1 of 24

Washington Mutual 2000-1

Mortgage Pass-Through Certificates

Lower Tier REMIC Series 2000-1

Certificate Payment Report for December 27, 2004 Distribution

Certificate Payment Report for January 25, 2005 Distribution

Distribution in Dollars - Current Period

Prior

Current

Class

Original

Principal

Total

Realized

Deferred

Principal

Class

Type

Face Value

Balance

Interest

Principal

Distribution

Losses

Interest

Balance

(1)

(2)

(3)

(4)=(2)+(3)

(5)

(6)

(7)=(1)-(3)-(5)+(6)

LT-A1

4,799,976,000.00

LT-A2

1,599,992,000.00

1981,~~001~~694,~~112,343~~914.0758

3,~~455~~416,~~730~~714.6860

1927,~~417~~586,~~428~~962.4910

2231,~~873~~003,~~159~~676.1770

~~981~~954,~~694~~107,~~914~~952.5848

LT-M1

100,523,000.00

3332,~~003~~363,~~703~~568.6261

~~113~~112,~~925~~638.1994

~~640~~909,~~135~~460.0129

~~754~~1,~~060~~022,099.2023

3231,~~363~~454,~~568~~108.6132

LT-M2

83,769,000.00

2726,~~503~~969,~~086~~640.3551

9493,~~937~~865.6679

~~533~~757,~~445~~883.8457

~~628~~851,~~383~~749.5036

26,~~969~~211,~~640~~756.5194

LT-M3

33,508,000.00

1110,~~001~~787,~~234~~856.5420

37,~~975~~546.0631

~~213~~303,~~378~~153.3443

~~251~~340,~~353~~699.4074

10,~~787~~484,~~856~~702.2077

LT-B1

40,209,000.00

76,~~398~~864,~~217~~771.0117

2523,~~537~~892.8431

~~533~~716,~~445~~910.8479

~~558~~740,~~983~~803.6810

6,~~864~~147,~~771~~860.1738

LT-B2

23,455,000.00

142,848.74

~~493~~497.1017

142,848.74

LT-B3

20,104,869.34

19,962,020.60

6869,~~906~~476.7230

-40,972.78

19,~~962~~921,~~020~~047.6082

LT-R

Total

6,701,536,869.34

1,~~100~~078,~~123~~785,~~453~~620.9242

3,~~797~~754,~~506~~631.2542

2130,~~337~~274,~~833~~370.5019

2534,~~135~~029,~~339~~001.7561

-40,972.78

1,~~078~~048,~~785~~470,~~620~~277.4245

Interest Accrual Detail

Current Period Factor Information per $1,000 of Original Face

Orig. Principal

Prior

Current

Period

(with Notional)

Principal

Total

Principal

Class

Starting

Ending

Method

Cusip

Balance

Interest

Principal

Distribution

Balance

(1)

(2)

(3)

(4)=(2)+(3)

(5)

LT-A1

F-30/360

4,799,976,000.00

LT-A2

F-30/360

1,599,992,000.00

~~625~~613.~~698343~~562389

2.~~159842~~135457

1217.~~135953~~241938

1419.~~295796~~377395

~~613~~596.~~562389~~320452

LT-M1

F-30/360

100,523,000.00

~~328~~321.~~319923~~951878

1.~~133325~~120529

69.~~368045~~047286

710.~~501370~~167815

~~321~~312.~~951878~~904592

LT-M2

F-30/360

83,769,000.00

~~328~~321.~~320576~~952518

1.~~133327~~120531

69.~~368058~~047304

710.~~501385~~167835

~~321~~312.~~952518~~905215

LT-M3

F-30/360

33,508,000.00

~~328~~321.~~316657~~948675

1.~~133313~~120518

69.~~367982~~047196

710.~~501295~~167713

~~321~~312.~~948675~~901479

LT-B1

F-30/360

40,209,000.00

~~183~~170.~~994056~~727229

0.~~635127~~594203

1317.~~266827~~829610

1318.~~901954~~423813

~~170~~152.~~727229~~897619

LT-B2

F-30/360

23,455,000.00

6.090332

0.~~021023~~021197

6.090332

LT-B3

F-30/360

20,104,869.34

992.894819

3.~~427365~~455695

~~992~~990.~~894819~~856866

LT-R

F-30/360

Page 2 of 24

Washington Mutual 2000-1

Mortgage Pass-Through Certificates

Lower Tier REMIC Series 2000-1

Certificate Payment Report for December 27, 2004 Distribution

Certificate Payment Report for January 25, 2005 Distribution

Distribution in Dollars - to Date

Current

Original

Unscheduled

Scheduled

Total

Realized

Deferred

Principal

Class

Face Value

Interest

Principal

Distribution

Losses

Interest

Balance

(1)

(2)

(3)

(4)

(5)=(3)+(4)

(6)=(2)+(5)

(7)

(8)

(9)=(1)-(5)-(7)+(8)

LT-A1

4,799,976,000.00

535,861,077.70

4,620,338,847.23

179,637,152.77

4,799,976,000.00

5,335,837,077.70

LT-A2

1,599,992,000.00

~~388~~391,~~335~~752,~~990~~705.7232

~~638~~666,~~453~~040,~~418~~381.9000

1,~~026~~057,~~789~~793,~~409~~086.6232

20,156,333.48

~~981~~954,~~694~~107,~~914~~952.5848

LT-M1

100,523,000.00

2223,~~904~~016,~~231~~870.7468

6869,~~159~~068,~~431~~891.3968

9192,~~063~~085,~~663~~762.1336

3231,~~363~~454,~~568~~108.6132

LT-M2

83,769,000.00

1819,~~986~~080,~~510~~375.1493

5657,~~799~~557,~~359~~243.4906

7576,~~785~~637,~~869~~618.6399

26,~~969~~211,~~640~~756.5194

LT-M3

33,508,000.00

7,~~594~~632,~~682~~228.0334

2223,~~720~~023,~~143~~297.8023

30,~~314~~655,~~825~~525.8357

10,~~787~~484,~~856~~702.2077

LT-B1

40,209,000.00

8,~~969~~993,~~742~~634.0031

3334,~~344~~061,~~228~~139.8362

4243,~~313~~054,~~970~~773.8393

6,~~864~~147,~~771~~860.1738

LT-B2

23,455,000.00

4,689,~~344~~842.9613

23,312,151.26

28,001,~~496~~993.2239

142,848.74

LT-B3

20,104,869.34

5,~~326~~395,~~400~~876.0030

~~142~~183,~~848~~821.7452

19,~~962~~921,~~020~~047.6082

LT-R

Total

6,701,536,869.34

~~992~~996,~~667~~422,~~979~~610.2971

4,620,338,847.23

1,~~022~~052,~~425~~700,~~886~~256.4362

5,~~642~~673,~~764~~039,~~733~~103.6685

6,~~635~~669,~~432~~461,~~712~~714.9556

~~142~~183,~~848~~821.7452

20,156,333.48

1,~~078~~048,~~785~~470,~~620~~277.4245

Interest Detail

Pass-

Prior Principal

Non-

Prior

Unscheduled

Paid or

Current

Through

(with Notional)

Accrued

Supported

Unpaid

Interest

Optimal

Deferred

Unpaid

Class

Rate

Balance

Interest

Interest SF

Interest

Adjustments

Interest

(1)

(2)

(3)

(4)

(5)=(1)-(2)+(3)+(4)

(6)

(7)=(5)-(6)

LT-A1

4.~~14227~~17651%

LT-A2

4.~~14227~~17651%

1981,~~001~~694,~~112,343~~914.0758

3,~~455~~416,~~730~~714.6860

LT-M1

4.~~14227~~17651%

3332,~~003~~363,~~703~~568.6261

~~113~~112,~~925~~638.1994

LT-M2

4.~~14227~~17651%

2726,~~503~~969,~~086~~640.3551

9493,~~937~~865.6679

LT-M3

4.~~14227~~17651%

1110,~~001~~787,~~234~~856.5420

37,~~975~~546.0631

LT-B1

4.~~14227~~17651%

76,~~398~~864,~~217~~771.0117

2523,~~537~~892.8431

LT-B2

4.~~14227~~17651%

142,848.74

~~493~~497.1017

LT-B3

4.~~14227~~17651%

19,962,020.60

6869,~~906~~476.7230

LT-R

Total

1,~~100~~078,~~123~~785,~~453~~620.9242

3,~~797~~754,~~506~~631.2542

Page 3 of 24

Washington Mutual 2000-1

Mortgage Pass-Through Certificates

Upper Tier REMIC Series 2000-1

Certificate Payment Report for December 27, 2004 Distribution

Certificate Payment Report for January 25, 2005 Distribution

Distribution in Dollars - Current Period

Prior

Current

Class

Original

Principal

Total

Realized

Deferred

Principal

Class

Type

Face Value

Balance

Interest

Principal

Distribution

Losses

Interest

Balance

(1)

(2)

(3)

(4)=(2)+(3)

(5)

(6)

(7)=(1)-(3)-(5)+(6)

STEP, FLT

4,799,976,000.00

CSTR

1,599,992,000.00

1981,~~001~~694,~~112,343~~914.0758

3,~~506~~468,~~847~~895.2242

1927,~~417~~586,~~428~~962.4910

2231,~~924~~055,~~275~~857.7152

~~981~~954,~~694~~107,~~914~~952.5848

MEZ, STEP

100,523,000.00

3332,~~003~~363,~~703~~568.6261

73,~~323~~454.2306

~~640~~909,~~135~~460.0129

~~713~~982,~~458~~914.2435

3231,~~363~~454,~~568~~108.6132

MEZ, STEP

83,769,000.00

2726,~~503~~969,~~086~~640.3551

7069,~~575~~901.9894

~~533~~757,~~445~~883.8457

~~604~~827,~~021~~785.8251

26,~~969~~211,~~640~~756.5194

MEZ, STEP

33,508,000.00

1110,~~001~~787,~~234~~856.5420

3736,~~230~~216.0148

~~213~~303,~~378~~153.3443

~~250~~339,~~608~~369.3591

10,~~787~~484,~~856~~702.2077

SUB, STEP

40,209,000.00

76,~~398~~864,~~217~~771.0117

3935,~~370~~488.8548

~~533~~716,~~445~~910.8479

~~572~~752,~~816~~399.6927

6,~~864~~147,~~771~~860.1738

SUB, STEP

23,455,000.00

142,848.74

1,~~252~~198.2376

142,848.74

SUB, CSTR

20,104,869.34

19,962,020.60

6869,~~906~~476.7230

-40,972.78

19,~~962~~921,~~020~~047.6082

UT-R

Total

6,701,536,869.34

1,~~100~~078,~~123~~785,~~453~~620.9242

3,~~797~~754,~~506~~631.2444

2130,~~337~~274,~~833~~370.5019

2534,~~135~~029,~~339~~001.7463

-40,972.78

1,~~078~~048,~~785~~470,~~620~~277.4245

Interest Accrual Detail

Current Period Factor Information per $1,000 of Original Face

Orig. Principal

Prior

Current

Period

(with Notional)

Principal

Total

Principal

Class

Starting

Ending

Method

Cusip

Balance

Interest

Principal

Distribution

Balance

(1)

(2)

(3)

(4)=(2)+(3)

(5)

1112/2627/04

1201/2624/0405

A-Act/360

863572L68

4,799,976,000.00

F-30/360

863572L76

1,599,992,000.00

~~625~~613.~~698343~~562389

2.~~191790~~168070

1217.~~135953~~241938

1419.~~327744~~410008

~~613~~596.~~562389~~320452

1112/2627/04

1201/2624/0405

A-Act/360

863572L84

100,523,000.00

~~328~~321.~~319923~~951878

0.~~729417~~730719

69.~~368045~~047286

79.~~097463~~778005

~~321~~312.~~951878~~904592

1112/2627/04

1201/2624/0405

A-Act/360

863572L92

83,769,000.00

~~328~~321.~~320576~~952518

0.~~842507~~834461

69.~~368058~~047304

79.~~210565~~881764

~~321~~312.~~952518~~905215

1112/2627/04

1201/2624/0405

A-Act/360

863572M26

33,508,000.00

~~328~~321.~~316657~~948675

1.~~111078~~080831

69.~~367982~~047196

710.~~479060~~128026

~~321~~312.~~948675~~901479

1112/2627/04

1201/2624/0405

A-Act/360

863572M34

40,209,000.00

~~183~~170.~~994056~~727229

0.~~979155~~882600

1317.~~266827~~829610

1418.~~245982~~712211

~~170~~152.~~727229~~897619

1112/2627/04

1201/2624/0405

A-Act/360

863572M42

23,455,000.00

6.090332

0.~~053389~~051109

6.090332

F-30/360

863572M59

20,104,869.34

992.894819

3.~~427365~~455695

~~992~~990.~~894819~~856866

UT-R

F-30/360

863572M67

Page 4 of 24

Washington Mutual 2000-1

Mortgage Pass-Through Certificates

Upper Tier REMIC Series 2000-1

Certificate Payment Report for December 27, 2004 Distribution

Certificate Payment Report for January 25, 2005 Distribution

Distribution in Dollars - to Date

Current

Original

Unscheduled

Scheduled

Total

Realized

Deferred

Principal

Class

Face Value

Interest

Principal

Distribution

Losses

Interest

Balance

(1)

(2)

(3)

(4)

(5)=(3)+(4)

(6)=(2)+(5)

(7)

(8)

(9)=(1)-(5)-(7)+(8)

4,799,976,000.00

386,931,317.18

4,620,338,847.23

179,637,152.77

4,799,976,000.00

5,186,907,317.18

1,599,992,000.00

~~548~~551,~~070~~539,~~334~~230.9234

~~581~~606,~~711~~733,~~796~~985.3085

5659,~~741~~306,~~622~~395.5915

~~638~~666,~~453~~040,~~418~~381.9000

1,~~186~~217,~~523~~579,~~753~~611.8234

20,156,333.48

~~981~~954,~~694~~107,~~914~~952.5848

100,523,000.00

13,~~793~~866,~~004~~458.5965

6364,~~446~~271,~~130~~037.5287

4,~~713~~797,~~300~~853.8781

6869,~~159~~068,~~431~~891.3968

8182,~~952~~935,~~435~~350.9833

3231,~~363~~454,~~568~~108.6132

83,769,000.00

12,~~739~~809,~~141~~043.1610

5253,~~471~~159,~~871~~294.5130

4,~~327~~397,~~487~~948.9877

5657,~~799~~557,~~359~~243.4906

6970,~~538~~366,~~500~~286.6516

26,~~969~~211,~~640~~756.5194

33,508,000.00

6,~~316~~352,~~676~~893.7422

2021,~~989~~264,~~119~~088.2233

1,~~731~~759,~~024~~208.5889

2223,~~720~~023,~~143~~297.8023

29,~~036~~376,~~820~~190.5445

10,~~787~~484,~~856~~702.2077

40,209,000.00

10,~~850~~885,~~027~~515.0755

3031,~~637~~287,~~669~~928.0027

2,~~706~~773,~~559~~211.8336

3334,~~344~~061,~~228~~139.8362

44,~~194~~946,~~255~~655.9017

6,~~864~~147,~~771~~860.1738

23,455,000.00

8,~~641~~642,~~077~~276.6339

21,701,370.05

1,610,781.21

23,312,151.26

31,~~953~~954,~~228~~427.8965

142,848.74

20,104,869.34

5,~~326~~395,~~399~~876.9727

~~142~~183,~~848~~821.7452

19,~~962~~921,~~020~~047.6082

UT-R

Total

6,701,536,869.34

~~992~~996,~~667~~422,~~979~~610.2670

5,~~391~~418,~~296~~756,~~803~~551.8390

~~251~~254,~~467~~282,~~929~~551.8395

5,~~642~~673,~~764~~039,~~733~~103.6685

6,~~635~~669,~~432~~461,~~712~~714.9255

~~142~~183,~~848~~821.7452

20,156,333.48

1,~~078~~048,~~785~~470,~~620~~277.4245

Interest Detail

Pass-

Prior Principal

Non-

Prior

Unscheduled

Paid or

Current

Through

(with Notional)

Accrued

Supported

Unpaid

Interest

Optimal

Deferred

Unpaid

Class

Rate

Balance

Interest

Interest SF

Interest

Adjustments

Interest

(1)

(2)

(3)

(4)

(5)=(1)-(2)+(3)+(4)

(6)

(7)=(5)-(6)

2.~~47000~~70750%

4.~~20354~~24029%

1981,~~001~~694,~~112,343~~914.0758

3,~~506~~468,~~847~~895.2242

2.~~58000~~81750%

3332,~~003~~363,~~703~~568.6261

73,~~323~~454.2306

23.~~98000~~21750%

2726,~~503~~969,~~086~~640.3551

7069,~~575~~901.9894

34.~~93000~~16750%

1110,~~001~~787,~~234~~856.5420

3736,~~230~~216.0148

6.~~18000~~41750%

76,~~398~~864,~~217~~771.0117

3935,~~370~~488.8548

########

142,848.74

1,~~252~~198.2376

4.~~14227~~17651%

19,962,020.60

6869,~~906~~476.7230

UT-R

Total

1,~~100~~078,~~123~~785,~~453~~620.9242

3,~~797~~754,~~506~~631.2444

Page 5 of 24

Washington Mutual 2000-1

Mortgage Pass-Through Certificates

A2-2 Components Series 2000-1

Certificate Payment Report for December 27, 2004 Distribution

Certificate Payment Report for January 25, 2005 Distribution

Distribution in Dollars - Current Period

Prior

Current

Class

Original

Principal

Total

Realized

Deferred

Principal

Class

Type

Face Value

Balance

Interest

Principal

Distribution

Losses

Interest

Balance

(1)

(2)

(3)

(4)=(2)+(3)

(5)

(6)

(7)=(1)-(3)-(5)+(6)

A1X

A2X

3,~~455~~416,~~730~~714.6860

M1X

4039,~~601~~184.9688

M2X

2423,~~361~~963.6885

M3X

~~745~~1,329.0583

B1X

B2X

Total

3,~~521~~481,~~439~~193.3716

Interest Accrual Detail

Current Period Factor Information per $1,000 of Original Face

Orig. Principal

Prior

Current

Period

(with Notional)

Principal

Total

Principal

Class

Starting

Ending

Method

Cusip

Balance

Interest

Principal

Distribution

Balance

(1)

(2)

(3)

(4)=(2)+(3)

(5)

A1X

A-30/360

4,799,976,000.00

A2X

A-30/360

1,599,992,000.00

~~625~~613.~~698343~~562389

2.~~159842~~135457

~~613~~596.~~562389~~320452

M1X

A-30/360

100,523,000.00

~~328~~321.~~319923~~951878

0.~~403907~~389810

~~321~~312.~~951878~~904592

M2X

A-30/360

83,769,000.00

~~328~~321.~~320576~~952518

0.~~290820~~286071

~~321~~312.~~952518~~905215

M3X

A-30/360

33,508,000.00

~~328~~321.~~316657~~948675

0.~~022235~~039687

~~321~~312.~~948675~~901479

B1X

A-30/360

40,209,000.00

~~183~~170.~~994056~~727229

~~170~~152.~~727229~~897619

B2X

A-30/360

23,455,000.00

6.090332

Page 6 of 24

Washington Mutual 2000-1

Mortgage Pass-Through Certificates

A2-2 Components Series 2000-1

Certificate Payment Report for December 27, 2004 Distribution

Certificate Payment Report for January 25, 2005 Distribution

Distribution in Dollars - to Date

Current

Original

Unscheduled

Scheduled

Total

Realized

Deferred

Principal

Class

Face Value

Interest

Principal

Distribution

Losses

Interest

Balance

(1)

(2)

(3)

(4)

(5)=(3)+(4)

(6)=(2)+(5)

(7)

(8)

(9)=(1)-(5)-(7)+(8)

A1X

149,714,942.52

A2X

~~388~~391,~~335~~752,~~990~~705.7535

M1X

9,~~144~~183,~~311~~496.3523

M2X

6,~~375~~399,~~086~~049.0691

M3X

1,~~546~~547,~~127~~457.3215

B1X

92,561.42

B2X

18,068.86

Total

~~555~~558,~~227~~708,~~088~~281.2844

Interest Detail

Pass-

Prior Principal

Non-

Prior

Unscheduled

Paid or

Current

Through

(with Notional)

Accrued

Supported

Unpaid

Interest

Optimal

Deferred

Unpaid

Class

Rate

Balance

Interest

Interest SF

Interest

Adjustments

Interest

(1)

(2)

(3)

(4)

(5)=(1)-(2)+(3)+(4)

(6)

(7)=(5)-(6)

A1X

1.~~58994~~55926%

A2X

4.~~14227~~17651%

1981,~~001~~694,~~112,343~~914.0758

3,~~455~~416,~~730~~714.6860

M1X

1.~~47627~~45293%

3332,~~003~~363,~~703~~568.6261

4039,~~601~~184.9688

M2X

1.~~06294~~06626%

2726,~~503~~969,~~086~~640.3551

2423,~~361~~963.6885

M3X

0.~~08127~~14793%

1110,~~001~~787,~~234~~856.5420

~~745~~1,329.0583

B1X

76,~~398~~864,~~217~~771.0117

B2X

142,848.74

Total

1,~~080~~058,~~161~~823,~~433~~599.3282

3,~~521~~481,~~439~~193.3716

Page 7 of 24

Washington Mutual 2000-1

Mortgage Pass-Through Certificates

Collection Account Report for December 27, 2004 Distribution

Collection Account Report for January 25, 2005 Distribution

Collection Account Report

SUMMARY

TOTAL

Principal Collections

2130,~~337~~274,~~833~~370.5019

Principal Withdrawals

0.00

TOTAL PRINCIPAL

2130,~~337~~274,~~833~~370.5019

Interest Collections

4,~~055~~016,~~545~~320.8359

Interest Withdrawals

0.00

Interest Other Accounts

0.00

Interest Fees

(~~258~~261,~~039~~689.5915)

TOTAL INTEREST

3,~~797~~754,~~506~~631.2444

TOTAL AVAILABLE FUNDS

2534,~~135~~029,~~339~~001.7463

PRINCIPAL - COLLECTIONS

TOTAL

Scheduled Principal

2,~~953~~814,~~837~~622.2712

Curtailments

1901,~~077,648~~099.6125

Prepayments in Full

1726,~~055~~172,~~542~~627.1419

Repurchases/Substitutions

0.00

Liquidations

~~250~~426,~~805~~994.4841

Insurance Principal

0.00

Other Additional Principal

0.00

Delinquent Principal

(~~718~~620,~~267~~846.9602)

Principal Advanced

~~718~~620,~~267~~846.9602

Total Realized Loss Of Principal

0(40,972.0078)

TOTAL PRINCIPAL COLLECTED

2130,~~337~~274,~~833~~370.5019

Page 8 of 24

Washington Mutual 2000-1

Mortgage Pass-Through Certificates

Collection Account Report for December 27, 2004 Distribution

Collection Account Report for January 25, 2005 Distribution

Collection Account Report

PRINCIPAL - WITHDRAWALS

TOTAL

SPACE INTENTIONALLY LEFT BLANK

PRINCIPAL - OTHER ACCOUNTS

TOTAL

SPACE INTENTIONALLY LEFT BLANK

INTEREST - COLLECTIONS

TOTAL

Scheduled Interest

4,~~141~~091,~~295~~063.9493

Repurchases/Substitutions

0.00

Liquidations

~~915~~1,587.6500

Insurance Interest

0.00

Other Additional Interest

0.00

Prepayment Interest Shortfalls

0.00

Delinquent Interest

(1937,~~053,550~~036.5926)

Compensating Interest

0.00

Relief Act Shortfall Amounts

0.00

Interest Advanced

~~966~~860,~~884~~705.8392

Deferred Interest

0.00

TOTAL INTEREST

4,~~055~~016,~~545~~320.8359

Page 9 of 24

Washington Mutual 2000-1

Mortgage Pass-Through Certificates

Collection Account Report for December 27, 2004 Distribution

Collection Account Report for January 25, 2005 Distribution

Collection Account Report

INTEREST - WITHDRAWALS

TOTAL

SPACE INTENTIONALLY LEFT BLANK

INTEREST - OTHER ACCOUNTS

TOTAL

SPACE INTENTIONALLY LEFT BLANK

INTEREST - FEES

TOTAL

Curent Servicing Fees

~~257~~260,~~122~~790.8216

Trustee Fee

~~916~~898.7799

TOTAL INTEREST FEES

~~258~~261,~~039~~689.5915

Page 10 of 24

Washington Mutual 2000-1

Mortgage Pass-Through Certificates

Credit Enhancement Report for December 27, 2004 Distribution

Credit Enhancement Report for January 25, 2005 Distribution

Credit Enhancement Report

ACCOUNTS

TOTAL

Beginning Reserve Fund Balance

5,000.00

Curr Period Required Reserve Fund Deposit

1412,~~592~~297.1476

Curr Distributions from Reserve Fund

(1412,~~592~~297.1476)

Reserve Fund Balance

5,000.00

INSURANCE

TOTAL

SPACE INTENTIONALLY LEFT BLANK

STRUCTURAL FEATURES

TOTAL

SPACE INTENTIONALLY LEFT BLANK

Page 11 of 24

Washington Mutual 2000-1

Mortgage Pass-Through Certificates

Collateral Report for December 27, 2004 Distribution

Collateral Report for January 25, 2005 Distribution

Collateral Report

COLLATERAL

TOTAL

Loan Count:

Original

17816

Prior

3,~~642~~583

Prefunding

Scheduled Paid Offs

Full Voluntary Prepayments

(5879)

Repurchases

Liquidations

(1)

Current

3,~~583~~503

Principal Balance:

Original

6,701,536,869.34

Prior

1,~~100~~078,~~123~~785,~~453~~620.9242

Prefunding

Scheduled Principal

(2,~~953~~814,~~837~~622.2712)

Partial and Full Voluntary Prepayments

(1827,~~133~~073,~~190~~726.7544)

Repurchases

Liquidations

(~~250~~426,~~805~~994.4841)

Current

1,~~078~~048,~~785~~470,~~620~~277.4245

PREFUNDING

TOTAL

SPACE INTENTIONALLY LEFT BLANK

Current Prin Balance by Groups (in millions of dollars)

Total Current Principal Balance (in millions of dollars)

Page 12 of 24

Washington Mutual 2000-1

Mortgage Pass-Through Certificates

Collateral Report for December 27, 2004 Distribution

Collateral Report for January 25, 2005 Distribution

Collateral Report

CHARACTERISTICS

TOTAL

Weighted Average Coupon Original

7.423436%

Weighted Average Coupon Prior

4.~~470189~~518269%

Weighted Average Coupon Current

4.~~518269~~552509%

Weighted Average Months to Maturity Original

332

Weighted Average Months to Maturity Prior

~~274~~273

Weighted Average Months to Maturity Current

~~273~~272

Weighted Avg Remaining Amortization Term Original

Weighted Avg Remaining Amortization Term Prior

~~274~~273

Weighted Avg Remaining Amortization Term Current

~~273~~272

Weighted Average Seasoning Original

Weighted Average Seasoning Prior

~~122~~123.09

Weighted Average Seasoning Current

~~123~~124.0931

Note: Original information refers to deal issue.

WAC by Groups

Total WAC

WARAT by Groups

Total WARAT

Note: Dates correspond to distribution dates.

Page 13 of 24

Washington Mutual 2000-1

Mortgage Pass-Through Certificates

Collateral Report for December 27, 2004 Distribution

Collateral Report for January 25, 2005 Distribution

Collateral Report

ARM CHARACTERISTICS

TOTAL

Weighted Average Margin Original

0.000%

Weighted Average Margin Prior

2.~~425~~423%

Weighted Average Margin Current

2.~~423~~422%

Weighted Average Max Rate Original

0.000%

Weighted Average Max Rate Prior

13.~~441~~459%

Weighted Average Max Rate Current

13.~~459~~469%

Weighted Average Min Rate Original

0.000%

Weighted Average Min Rate Prior

3.~~188~~186%

Weighted Average Min Rate Current

3.~~186~~182%

Weighted Average Cap Up Original

0.000%

Weighted Average Cap Up Prior

0.001%

Weighted Average Cap Up Current

0.001%

Weighted Average Cap Down Original

0.000%

Weighted Average Cap Down Prior

0.001%

Weighted Average Cap Down Current

0.001%

Note: Original information refers to deal issue.

SERVICING FEES / ADVANCES

TOTAL

Current Servicing Fees

~~257~~260,~~122~~790.8216

Delinquent Servicing Fees

8676,~~665~~330.7634

TOTAL SERVICING FEES

~~343~~337,~~788~~120.5850

Total Servicing Fees

~~343~~337,~~788~~120.5850

Compensating Interest

0.00

Delinquent Servicing Fees

(8676,~~665~~330.7634)

COLLECTED SERVICING FEES

~~257~~260,~~122~~790.8216

Current PPIS

0.00

Current Net PPIS

0.00

Total Advanced Principal For Current Payment Date

~~718~~620,~~267~~846.9602

Total Advanced Interest For Current Payment Date

~~966~~860,~~884~~705.8392

TOTAL ADVANCES FOR CURRENT PERIOD

1,~~685~~481,~~152~~551.7994

ADDITIONAL COLLATERAL INFORMATION

TOTAL

SPACE INTENTIONALLY LEFT BLANK

Page 14 of 24

Washington Mutual 2000-1

Mortgage Pass-Through Certificates

Delinquency Report for December 27, 2004 Distribution

Delinquency Report for January 25, 2005 Distribution

Delinquency Report - Total

<1 PAYMENT

1 PAYMENT

2 PAYMENTS

3+ PAYMENTS

TOTAL

DELINQUENT

Balance

76,~~213~~063,~~781~~365.4642

1,~~087~~450,~~530~~560.5214

1,~~006~~009,~~636~~506.6903

98,~~307~~523,~~948~~431.6759

% Balance

0.6758%

0.1014%

0.0910%

0.8681%

# Loans

2519

3026

% # Loans

0.7054%

0.0614%

0.0806%

0.8474%

FORECLOSURE

Balance

~~350,252.29~~-

-364,272.34

43,~~626~~971,~~651~~917.4368

4,~~976~~336,~~903~~190.7202

% Balance

0.0300%

0.0003%

0.00%

0.4338%

0.4641%

# Loans

-1

117

128

% # Loans

0.0300%

0.0003%

0.00%

0.3120%

0.3323%

BANKRUPTCY

Balance

2,~~290~~026,~~102~~464.7358

~~250~~249,~~341~~168.7897

1,~~629~~627,~~963~~180.8641

43,~~170~~902,~~408~~813.3796

% Balance

0.2119%

0.02%

0.00%

0.1516%

0.3937%

# Loans

1211

% # Loans

0.2017%

0.03%

0.00%

0.11%

0.3331%

REO

Balance

1749,~~178,167~~655.0215

% Balance

0.00%

0.1107%

# Loans

% # Loans

0.00%

0.0603%

TOTAL

Balance

2,~~640~~026,~~355~~464.0258

76,~~464~~676,~~123~~806.2473

1,~~087~~450,~~530~~560.5214

87,~~441~~358,~~419~~259.0027

1917,~~633~~512,~~427~~090.7872

% Balance

0.2419%

0.6964%

0.1014%

0.7870%

1.8267%

# Loans

2621

2014

5646

% # Loans

0.2217%

0.7360%

0.0614%

0.5640%

1.5631%

Note: <1 Payment = 0-29days, 1 Payment = 30-59days, 2 Payments = 60-89days, 3+ Payments = 90+

6 Months Moving Average

1 or 2 Payments Delinquent

3 or More Payments Delinquent

Total Foreclosure

Total Bankruptcy and REO

Note: Dates correspond to distribution dates.

Page 15 of 24

Washington Mutual 2000-1

Mortgage Pass-Through Certificates

REO Report for December 27, 2004 Distribution

REO Report for January 25, 2005 Distribution

REO Report - Mortgage Loans that Become REO During Current Distribution

SUMMARY

LOAN GROUP

Total Loan Count = 0

Loan Group 1 = ; REO Book Value = Not Available

Total Original Principal Balance = 000.00

Total Current Balance = 000.00

REO Book Value = Not Available

REO Book Value reported corresponds to total REO loans, including loans that become REO during current distribution.

Loan Number

Original

Stated

Current

State &

Principal

Paid to

Note

LTV at

Original

Origination

Loan Group

Balance

Date

Rate

Origination

Term

Date

SPACE INTENTIONALLY LEFT BLANK

Page 16 of 24

Washington Mutual 2000-1

Mortgage Pass-Through Certificates

Prepayment Report for December 27, 2004 Distribution

Prepayment Report for January 25, 2005 Distribution

Prepayment Report - Voluntary Prepayments

VOLUNTARY PREPAYMENTS

TOTAL

Current

Number of Paid in Full Loans

5879

Number of Repurchased Loans

Total Number of Loans Prepaid in Full

5879

Paid in Full Balance

1726,~~055~~172,~~542~~627.1419

Repurchased Loans Balance

Curtailments Amount

1901,~~077,648~~099.6125

Total Prepayment Amount

1827,~~133~~073,~~190~~726.7544

Cumulative

Number of Paid in Full Loans

9,~~236~~315

Number of Repurchased Loans

Total Number of Loans Prepaid in Full

9,~~236~~315

Paid in Full Balance

5,~~174~~200,~~524~~697,~~552~~179.5978

Repurchased Loans Balance

Curtailments Amount

~~196~~197,~~507~~409,~~961~~060.0227

Total Prepayment Amount

5,~~371~~398,~~032~~106,~~513~~240.6105

SPACE INTENTIONALLY LEFT BLANK

Total Prepayments by Groups (in thousands of dollars)

Total Prepayments (in thousands of dollars)

Page 17 of 24

Washington Mutual 2000-1

Mortgage Pass-Through Certificates

Prepayment Report for December 27, 2004 Distribution

Prepayment Report for January 25, 2005 Distribution

Prepayment Report - Voluntary Prepayments

VOLUNTARY PREPAYMENT RATES

TOTAL

SMM

12.6552%

3 Months Avg SMM

1.7796%

12 Months Avg SMM

2.3831%

Avg SMM Since Cut-off

2.9796%

CPR

1826.1335%

3 Months Avg CPR

1921.3017%

12 Months Avg CPR

2524.1448%

Avg CPR Since Cut-off

30.3831%

PSA

~~302~~439.0912%

3 Months Avg PSA Approximation

~~321~~352.5991%

12 Months Avg PSA Approximation

~~418~~408.9703%

Avg PSA Since Cut-off Approximation

~~506~~505.3421%

CPR by Groups

Total CPR

PSA by Groups

Total PSA

Page 18 of 24

Washington Mutual 2000-1

Mortgage Pass-Through Certificates

Prepayment Report for December 27, 2004 Distribution

Prepayment Report for January 25, 2005 Distribution

Prepayment Report - Voluntary Prepayments

CPR Avg since Cut-Off by Groups

Total CPR Avg since Cut-Off

PSA Avg since Cut-Off by Groups

Total PSA Avg since Cut-Off

PREPAYMENT CALCULATION METHODOLOGY

Single Monthly Mortality (SMM): (Voluntary partial and full prepayments + Repurchases)/(Beg Principal Balance - Sched Principal)

Conditional Prepayment Rate (CPR): 1-((1-SMM)^12)

PSA Standard Prepayment Model: CPR/(0.02*min(30,WAS))

Average SMM over period between nth month and mth month (AvgSMMn,m): [(1-SMMn) * (1-SMMn+1) *.......*(1-SMMm)]^(1/months in period n,m)

Average SMM over period between nth month and mth month (AvgSMMn,m): [(1-SMMn) * (1-SMMn+1) *…….*(1-SMMm)]^(1/months in period n,m)

Average CPR over period between the nth month and mth month (AvgCPRn,m): 1-((1-AvgSMMn,m)^12)

Average PSA Approximation over period between the nth month and mth month: AvgCPRn,m/(0.002*Avg WASn,m))

Average WASn,m: (min(30,WASn)+min(30,WASn+1)+.......+min(30,WASm)/(number of months in the period n,m)

Average WASn,m: (min(30,WASn)+min(30,WASn+1)+…….+min(30,WASm)/(number of months in the period n,m)

Weighted Average Seasoning (WAS)

Note: Prepayment rates are calculated since deal issue date and include partial and full voluntary prepayments and repurchases.

Dates correspond to distribution dates.

Page 19 of 24

Washington Mutual 2000-1

Mortgage Pass-Through Certificates

Realized Loss Report for December 27, 2004 Distribution

Realized Loss Report for January 25, 2005 Distribution

Realized Loss Report - Collateral

COLLATERAL REALIZED LOSSES

TOTAL

Current

Number of Loans Liquidated

Collateral Realized Loss/(Gain) Amount

-40,972.78

Net Liquidation Proceeds

~~250~~386,~~805~~021.4863

Cumulative

Number of Loans Liquidated

Collateral Realized Loss/(Gain) Amount

~~142~~183,~~848~~821.7452

Net Liquidation Proceeds

~~107~~493,~~956~~978.7437

Note: Collateral Realized Loss Amount may include adjustments to loans liquidated in prior periods.

SPACE INTENTIONALLY LEFT BLANK

3 Months Moving Average

Collateral Loss Severity Approximation by Groups

Collateral Loss Severity Approximation

Page 20 of 24

Washington Mutual 2000-1

Mortgage Pass-Through Certificates

Realized Loss Report for December 27, 2004 Distribution

Realized Loss Report for January 25, 2005 Distribution

Realized Loss Report - Collateral

DEFAULT SPEEDS

TOTAL

MDR

0.0204%

3 Months Avg MDR

0.0102%

12 Months Avg MDR

0.0001%

Avg MDR Since Cut-off

0.00%

CDR

0.2747%

3 Months Avg CDR

0.0925%

12 Months Avg CDR

0.0206%

Avg CDR Since Cut-off

0.0001%

SDA

915.1180%

3 Months Avg SDA Approximation

38.0431%

12 Months Avg SDA Approximation

01.4136%

Avg SDA Since Cut-off Approximation

0.0206%

Loss Severity Approximation for Current Period

3 Months Avg Loss Severity Approximation

12 Months Avg Loss Severity Approximation

Avg Loss Severity Approximation Since Cut-off

CDR by Groups

Total CDR

SDA by Groups

Total SDA

Page 21 of 24

Washington Mutual 2000-1

Mortgage Pass-Through Certificates

Realized Loss Report for December 27, 2004 Distribution

Realized Loss Report for January 25, 2005 Distribution

Realized Loss Report - Collateral

CDR Avg since Cut-Off by Groups

Total CDR Avg since Cut-Off

SDA Avg since Cut-Off by Groups

Total SDA Avg since Cut-Off

COLLATERAL REALIZED LOSS CALCULATION METHODOLOGY

Monthly Default Rate (MDR): (Beg Principal Balance of Liquidated Loans)/(Total Beg Principal Balance)

Conditional Default Rate (CDR): 1-((1-MDR)^12)

SDA Standard Default Assumption: CDR/IF(WAS<61,MIN(30,WAS)*0.02,MAX(0.03,MIN(30,WAS)*0.02-0.0095*(WAS-60)))

Average MDR over period between nth month and mth month (AvgMDRn,m): [(1-MDRn) * (1-MDRn+1) *.......*(1-MDRm)]^(1/months in period n,m)

Average MDR over period between nth month and mth month (AvgMDRn,m): [(1-MDRn) * (1-MDRn+1) *…….*(1-MDRm)]^(1/months in period n,m)

Average CDR over period between the nth month and mth month (AvgCDRn,m): 1-((1-AvgMDRn,m)^12)

Average SDA Approximation over period between the nth month and mth month:

AvgCDRn,m/IF(Avg WASn,m<61,MIN(30,Avg WASn,m)*0.02,MAX(0.03,MIN(30,Avg WASn,m)*0.02-0.0095*(Avg WASn,m-60)))

Average WASn,m: (WASn + WASn+1 +.......+ WASm )/(number of months in the period n,m)

Average WASn,m: (WASn + WASn+1 +…….+ WASm )/(number of months in the period n,m)

Loss Severity Approximation for current period: sum(Realized Loss Amount)/sum(Beg Principal Balance of Liquidated Loans)

Average Loss Severity Approximation over period between nth month and mth month: Avg(Loss Severityn,m)

Note: Default rates are calculated since deal issue date and include realized gains and additional realized losses and gains from prior periods.

Dates correspond to distribution dates.

Page 22 of 24

Washington Mutual 2000-1

Mortgage Pass-Through Certificates

Realized Loss Detail Report for December 27, 2004 Distribution

Realized Loss Detail Report for January 25, 2005 Distribution

Realized Loss Detail Report - Loans Liquidated During Current Distribution

SUMMARY

LOAN GROUP

Total Loan Count Current Losses = 1

Total Loan Count Revisions = 0

Loan Group 1 =

Total Prior Principal Balance = 250,805.48

Total Prior Principal Balance = 426,994.41

Total Current Realized Loss Amount = 0.00

Total Current Realized Loss Amount = 40,972.78

Total Revisions Amount = 0.00

Total Realized Loss Amount = 0.00

Total Realized Loss Amount = 40,972.78

Total Net Liquidation Proceeds = 250,805.48

Total Net Liquidation Proceeds = 386,021.63

Note: Total Realized Loss Amount may include adjustments to loans liquidated in prior periods.

Loan Number

Current

State &

Prior

Realized

Cumulative

Loan

Note

LTV at

Original

Principal

Loss/(Gain)

Realized

Loan Group

Status

Rate

Origination

Term

Balance

Revisions

Loss/(Gain)

SPACE INTENTIONALLY LEFT BLANK

816215503 1

REO

4.460%

TX - 80.00%

360

426,994.41

40,972.78

Page 23 of 24

Washington Mutual 2000-1

Mortgage Pass-Through Certificates

Additional Certificate Report for December 27, 2004 Distribution

Additional Certificate Report for January 25, 2005 Distribution

Additional Certificate Report

CLASS

Carryforward Interest

Basis Risk Shortfall Reimbursed

Basis Risk Shortfall

Unpaid Basis Risk Shortfall

0.00

1311,~~833~~596.0117

0.00

~~759~~701.1359

0.00

Page 24 of 24

Filing Compare · WASHINGTON MUTUAL MORT PS THR CERTS SER 2003-R1