
                                    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 27, 2004
                             (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 27, 2004.


                                  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 27, 2004               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 27, 2004.


	Washington Mutual 2000-1
	Mortgage Pass-Through Certificates


	December 27, 2004 Distribution


	Contents



			TABLE OF CONTENTS

								Page

			1.	Contents				1
			2.	Certificate Payment Report				2
			3.	Collection Account Report				8
			4.	Credit Enhancement Report				11
			5.	Collateral Report				12
			6.	Delinquency Report				15
			7.	REO Report				16
			8.	Prepayment Report				17
			9.	Realized Loss Report				20
			10.	Realized Loss Detail Report				23
			11.	Additional Certificate Report				24






				Total Number of Pages				24



			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
	Underwriter(s):		Lehman Brothers Underwriter					Record Date: December 24, 2004
								November 30, 2004






						Page 1 of 24					© COPYRIGHT 2004 Deutsche Bank
	Washington Mutual 2000-1
	Mortgage Pass-Through Certificates
	Lower Tier REMIC Series 2000-1
	Certificate Payment Report for December 27, 2004 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			1,001,112,343.07	3,455,730.68	19,417,428.49	22,873,159.17	-	-	981,694,914.58
LT-M1		100,523,000.00			33,003,703.62	113,925.19	640,135.01	754,060.20	-	-	32,363,568.61
LT-M2		83,769,000.00			27,503,086.35	94,937.66	533,445.84	628,383.50	-	-	26,969,640.51
LT-M3		33,508,000.00			11,001,234.54	37,975.06	213,378.34	251,353.40	-	-	10,787,856.20
LT-B1		40,209,000.00			7,398,217.01	25,537.84	533,445.84	558,983.68	-	-	6,864,771.17
LT-B2		23,455,000.00			142,848.74	493.10	-	493.10	-	-	142,848.74
LT-B3		20,104,869.34			19,962,020.60	68,906.72	-	68,906.72	-	-	19,962,020.60
LT-R		-			-	-	-	-	-	-	-


Total		6,701,536,869.34			1,100,123,453.92	3,797,506.25	21,337,833.50	25,135,339.75	-	-	1,078,785,620.42


	Interest Accrual Detail				Current Period Factor Information per $1,000 of Original Face
						Orig. Principal	Prior				Current
	Period	Period				(with Notional)	Principal			Total	Principal
Class	Starting	Ending		Method	Cusip	Balance	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	625.698343	2.159842	12.135953	14.295796	613.562389
LT-M1				F-30/360		100,523,000.00	328.319923	1.133325	6.368045	7.501370	321.951878
LT-M2				F-30/360		83,769,000.00	328.320576	1.133327	6.368058	7.501385	321.952518
LT-M3				F-30/360		33,508,000.00	328.316657	1.133313	6.367982	7.501295	321.948675
LT-B1				F-30/360		40,209,000.00	183.994056	0.635127	13.266827	13.901954	170.727229
LT-B2				F-30/360		23,455,000.00	6.090332	0.021023	-	0.021023	6.090332
LT-B3				F-30/360		20,104,869.34	992.894819	3.427365	-	3.427365	992.894819
LT-R				F-30/360		-	-	-	-	-	-


							Page 2 of 24				© COPYRIGHT 2004 Deutsche Bank
	Washington Mutual 2000-1
	Mortgage Pass-Through Certificates
	Lower Tier REMIC Series 2000-1
	Certificate Payment Report for December 27, 2004 Distribution


	Distribution in Dollars - to Date
											Current
	Original				Unscheduled	Scheduled	Total	Total	Realized	Deferred	Principal
Class	Face Value		Interest		Principal	Principal	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		388,335,990.72		-	638,453,418.90	638,453,418.90	1,026,789,409.62	-	20,156,333.48	981,694,914.58
LT-M1	100,523,000.00		22,904,231.74		-	68,159,431.39	68,159,431.39	91,063,663.13	-	-	32,363,568.61
LT-M2	83,769,000.00		18,986,510.14		-	56,799,359.49	56,799,359.49	75,785,869.63	-	-	26,969,640.51
LT-M3	33,508,000.00		7,594,682.03		-	22,720,143.80	22,720,143.80	30,314,825.83	-	-	10,787,856.20
LT-B1	40,209,000.00		8,969,742.00		-	33,344,228.83	33,344,228.83	42,313,970.83	-	-	6,864,771.17
LT-B2	23,455,000.00		4,689,344.96		-	23,312,151.26	23,312,151.26	28,001,496.22	-	-	142,848.74
LT-B3	20,104,869.34		5,326,400.00		-	-	-	5,326,400.00	142,848.74	-	19,962,020.60
LT-R	-		-		-	-	-	-	-	-	-


Total	6,701,536,869.34		992,667,979.29		4,620,338,847.23	1,022,425,886.43	5,642,764,733.66	6,635,432,712.95	142,848.74	20,156,333.48	1,078,785,620.42


	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	Interest	Interest
					(1)	(2)	(3)	(4)	(5)=(1)-(2)+(3)+(4)	(6)	(7)=(5)-(6)

LT-A1	4.14227%	-			-	-	-	-	-	-	-
LT-A2	4.14227%	1,001,112,343.07			3,455,730.68	-	-	-	3,455,730.68	3,455,730.68	-
LT-M1	4.14227%	33,003,703.62			113,925.19	-	-	-	113,925.19	113,925.19	-
LT-M2	4.14227%	27,503,086.35			94,937.66	-	-	-	94,937.66	94,937.66	-
LT-M3	4.14227%	11,001,234.54			37,975.06	-	-	-	37,975.06	37,975.06	-
LT-B1	4.14227%	7,398,217.01			25,537.84	-	-	-	25,537.84	25,537.84	-
LT-B2	4.14227%	142,848.74			493.10	-	-	-	493.10	493.10	-
LT-B3	4.14227%	19,962,020.60			68,906.72	-	-	-	68,906.72	68,906.72	-
LT-R		-			-	-	-	-	-	-	-


Total		1,100,123,453.92			3,797,506.25	-	-	-	3,797,506.25	3,797,506.25	-


							Page 3 of 24				© COPYRIGHT 2004 Deutsche Bank
	Washington Mutual 2000-1
	Mortgage Pass-Through Certificates
	Upper Tier REMIC Series 2000-1
	Certificate Payment Report for December 27, 2004 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)

A1	STEP, FLT	4,799,976,000.00			-	-	-	-	-	-	-
A2	CSTR	1,599,992,000.00			1,001,112,343.07	3,506,847.22	19,417,428.49	22,924,275.71	-	-	981,694,914.58
M1	MEZ, STEP	100,523,000.00			33,003,703.62	73,323.23	640,135.01	713,458.24	-	-	32,363,568.61
M2	MEZ, STEP	83,769,000.00			27,503,086.35	70,575.98	533,445.84	604,021.82	-	-	26,969,640.51
M3	MEZ, STEP	33,508,000.00			11,001,234.54	37,230.01	213,378.34	250,608.35	-	-	10,787,856.20
B1	SUB, STEP	40,209,000.00			7,398,217.01	39,370.85	533,445.84	572,816.69	-	-	6,864,771.17
B2	SUB, STEP	23,455,000.00			142,848.74	1,252.23	-	1,252.23	-	-	142,848.74
B3	SUB, CSTR	20,104,869.34			19,962,020.60	68,906.72	-	68,906.72	-	-	19,962,020.60
UT-R	R	-			-	-	-	-	-	-	-


Total		6,701,536,869.34			1,100,123,453.92	3,797,506.24	21,337,833.50	25,135,339.74	-	-	1,078,785,620.42


	Interest Accrual Detail				Current Period Factor Information per $1,000 of Original Face
						Orig. Principal	Prior				Current
	Period	Period				(with Notional)	Principal			Total	Principal
Class	Starting	Ending		Method	Cusip	Balance	Balance	Interest	Principal	Distribution	Balance
							(1)	(2)	(3)	(4)=(2)+(3)	(5)

A1	11/26/04	12/26/04		A-Act/360	863572L68	4,799,976,000.00	-	-	-	-	-
A2				F-30/360	863572L76	1,599,992,000.00	625.698343	2.191790	12.135953	14.327744	613.562389
M1	11/26/04	12/26/04		A-Act/360	863572L84	100,523,000.00	328.319923	0.729417	6.368045	7.097463	321.951878
M2	11/26/04	12/26/04		A-Act/360	863572L92	83,769,000.00	328.320576	0.842507	6.368058	7.210565	321.952518
M3	11/26/04	12/26/04		A-Act/360	863572M26	33,508,000.00	328.316657	1.111078	6.367982	7.479060	321.948675
B1	11/26/04	12/26/04		A-Act/360	863572M34	40,209,000.00	183.994056	0.979155	13.266827	14.245982	170.727229
B2	11/26/04	12/26/04		A-Act/360	863572M42	23,455,000.00	6.090332	0.053389	-	0.053389	6.090332
B3				F-30/360	863572M59	20,104,869.34	992.894819	3.427365	-	3.427365	992.894819
UT-R				F-30/360	863572M67	-	-	-	-	-	-


							Page 4 of 24				© COPYRIGHT 2004 Deutsche Bank
	Washington Mutual 2000-1
	Mortgage Pass-Through Certificates
	Upper Tier REMIC Series 2000-1
	Certificate Payment Report for December 27, 2004 Distribution


	Distribution in Dollars - to Date
											Current
	Original				Unscheduled	Scheduled	Total	Total	Realized	Deferred	Principal
Class	Face Value		Interest		Principal	Principal	Principal	Distribution	Losses	Interest	Balance
	(1)		(2)		(3)	(4)	(5)=(3)+(4)	(6)=(2)+(5)	(7)	(8)	(9)=(1)-(5)-(7)+(8)

A1	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	-	-	-
A2	1,599,992,000.00		548,070,334.92		581,711,796.30	56,741,622.59	638,453,418.90	1,186,523,753.82	-	20,156,333.48	981,694,914.58
M1	100,523,000.00		13,793,004.59		63,446,130.52	4,713,300.87	68,159,431.39	81,952,435.98	-	-	32,363,568.61
M2	83,769,000.00		12,739,141.16		52,471,871.51	4,327,487.98	56,799,359.49	69,538,500.65	-	-	26,969,640.51
M3	33,508,000.00		6,316,676.74		20,989,119.22	1,731,024.58	22,720,143.80	29,036,820.54	-	-	10,787,856.20
B1	40,209,000.00		10,850,027.07		30,637,669.00	2,706,559.83	33,344,228.83	44,194,255.90	-	-	6,864,771.17
B2	23,455,000.00		8,641,077.63		21,701,370.05	1,610,781.21	23,312,151.26	31,953,228.89	-	-	142,848.74
B3	20,104,869.34		5,326,399.97		-	-	-	5,326,399.97	142,848.74	-	19,962,020.60
UT-R	-		-		-	-	-	-	-	-	-


Total	6,701,536,869.34		992,667,979.26		5,391,296,803.83	251,467,929.83	5,642,764,733.66	6,635,432,712.92	142,848.74	20,156,333.48	1,078,785,620.42


	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	Interest	Interest
					(1)	(2)	(3)	(4)	(5)=(1)-(2)+(3)+(4)	(6)	(7)=(5)-(6)

A1	2.47000%	-			-	-	-	-	-	-	-
A2	4.20354%	1,001,112,343.07			3,506,847.22	-	-	-	3,506,847.22	3,506,847.22	-
M1	2.58000%	33,003,703.62			73,323.23	-	-	-	73,323.23	73,323.23	-
M2	2.98000%	27,503,086.35			70,575.98	-	-	-	70,575.98	70,575.98	-
M3	3.93000%	11,001,234.54			37,230.01	-	-	-	37,230.01	37,230.01	-
B1	6.18000%	7,398,217.01			39,370.85	-	-	-	39,370.85	39,370.85	-
B2	########	142,848.74			1,252.23	-	-	-	1,252.23	1,252.23	-
B3	4.14227%	19,962,020.60			68,906.72	-	-	-	68,906.72	68,906.72	-
UT-R		-			-	-	-	-	-	-	-


Total		1,100,123,453.92			3,797,506.24	-	-	-	3,797,506.24	3,797,506.24	-


							Page 5 of 24				© COPYRIGHT 2004 Deutsche Bank
	Washington Mutual 2000-1
	Mortgage Pass-Through Certificates
	A2-2 Components Series 2000-1
	Certificate Payment Report for December 27, 2004 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		-			-	3,455,730.68	-	3,455,730.68	-	-	-
M1X		-			-	40,601.96	-	40,601.96	-	-	-
M2X		-			-	24,361.68	-	24,361.68	-	-	-
M3X		-			-	745.05	-	745.05	-	-	-
B1X		-			-	-	-	-	-	-	-
B2X		-			-	-	-	-	-	-	-


Total		-			-	3,521,439.37	-	3,521,439.37	-	-	-


	Interest Accrual Detail				Current Period Factor Information per $1,000 of Original Face
						Orig. Principal	Prior				Current
	Period	Period				(with Notional)	Principal			Total	Principal
Class	Starting	Ending		Method	Cusip	Balance	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	625.698343	2.159842	-	2.159842	613.562389
M1X				A-30/360		100,523,000.00	328.319923	0.403907	-	0.403907	321.951878
M2X				A-30/360		83,769,000.00	328.320576	0.290820	-	0.290820	321.952518
M3X				A-30/360		33,508,000.00	328.316657	0.022235	-	0.022235	321.948675
B1X				A-30/360		40,209,000.00	183.994056	-	-	-	170.727229
B2X				A-30/360		23,455,000.00	6.090332	-	-	-	6.090332


							Page 6 of 24				© COPYRIGHT 2004 Deutsche Bank
	Washington Mutual 2000-1
	Mortgage Pass-Through Certificates
	A2-2 Components Series 2000-1
	Certificate Payment Report for December 27, 2004 Distribution


	Distribution in Dollars - to Date
											Current
	Original				Unscheduled	Scheduled	Total	Total	Realized	Deferred	Principal
Class	Face Value		Interest		Principal	Principal	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		-	-	-	149,714,942.52	-	-	-
A2X	-		388,335,990.75		-	-	-	388,335,990.75	-	-	-
M1X	-		9,144,311.35		-	-	-	9,144,311.35	-	-	-
M2X	-		6,375,086.06		-	-	-	6,375,086.06	-	-	-
M3X	-		1,546,127.32		-	-	-	1,546,127.32	-	-	-
B1X	-		92,561.42		-	-	-	92,561.42	-	-	-
B2X	-		18,068.86		-	-	-	18,068.86	-	-	-


Total	-		555,227,088.28		-	-	-	555,227,088.28	-	-	-


	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	Interest	Interest
					(1)	(2)	(3)	(4)	(5)=(1)-(2)+(3)+(4)	(6)	(7)=(5)-(6)

A1X	1.58994%	-			-	-	-	-	-	-	-
A2X	4.14227%	1,001,112,343.07			3,455,730.68	-	-	-	3,455,730.68	3,455,730.68	-
M1X	1.47627%	33,003,703.62			40,601.96	-	-	-	40,601.96	40,601.96	-
M2X	1.06294%	27,503,086.35			24,361.68	-	-	-	24,361.68	24,361.68	-
M3X	0.08127%	11,001,234.54			745.05	-	-	-	745.05	745.05	-
B1X		7,398,217.01			-	-	-	-	-	-	-
B2X		142,848.74			-	-	-	-	-	-	-


Total		1,080,161,433.32			3,521,439.37	-	-	-	3,521,439.37	3,521,439.37	-


							Page 7 of 24				© COPYRIGHT 2004 Deutsche Bank
	Washington Mutual 2000-1
	Mortgage Pass-Through Certificates

	Collection Account Report for December 27, 2004 Distribution


	Collection Account Report


SUMMARY								TOTAL

	Principal Collections							21,337,833.50
	Principal Withdrawals							0.00

	TOTAL PRINCIPAL							21,337,833.50

	Interest Collections							4,055,545.83
	Interest Withdrawals							0.00
	Interest Other Accounts							0.00
	Interest Fees							(258,039.59)
	TOTAL INTEREST							3,797,506.24

	TOTAL AVAILABLE FUNDS							25,135,339.74


PRINCIPAL - COLLECTIONS								TOTAL

	Scheduled Principal							2,953,837.27
	Curtailments							1,077,648.61
	Prepayments in Full							17,055,542.14
	Repurchases/Substitutions							0.00
	Liquidations							250,805.48
	Insurance Principal							0.00
	Other Additional Principal							0.00
	Delinquent Principal							(718,267.96)
	Principal Advanced							718,267.96
	Total Realized Loss Of Principal							0.00

	TOTAL PRINCIPAL COLLECTED							21,337,833.50


				Page 8 of 24				© COPYRIGHT 2004 Deutsche Bank
	Washington Mutual 2000-1
	Mortgage Pass-Through Certificates

	Collection Account Report for December 27, 2004 Distribution


	Collection Account Report


PRINCIPAL - WITHDRAWALS								TOTAL
SPACE INTENTIONALLY LEFT BLANK


PRINCIPAL - OTHER ACCOUNTS								TOTAL
SPACE INTENTIONALLY LEFT BLANK


INTEREST - COLLECTIONS								TOTAL

	Scheduled Interest							4,141,295.94
	Repurchases/Substitutions							0.00
	Liquidations							915.65
	Insurance Interest							0.00
	Other Additional Interest							0.00
	Prepayment Interest Shortfalls							0.00
	Delinquent Interest							(1,053,550.59)
	Compensating Interest							0.00
	Relief Act Shortfall Amounts							0.00
	Interest Advanced							966,884.83
	Deferred Interest							0.00


	TOTAL INTEREST							4,055,545.83


				Page 9 of 24				© COPYRIGHT 2004 Deutsche Bank
	Washington Mutual 2000-1
	Mortgage Pass-Through Certificates

	Collection Account Report for December 27, 2004 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							257,122.82
	Trustee Fee							916.77



	TOTAL INTEREST FEES							258,039.59


				Page 10 of 24				© COPYRIGHT 2004 Deutsche Bank
	Washington Mutual 2000-1
	Mortgage Pass-Through Certificates

	Credit Enhancement Report for December 27, 2004 Distribution


	Credit Enhancement Report


ACCOUNTS								TOTAL

	Beginning Reserve Fund Balance							5,000.00
	Curr Period Required Reserve Fund Deposit							14,592.14
	Curr Distributions from Reserve Fund							(14,592.14)
	Reserve Fund Balance							5,000.00


INSURANCE								TOTAL
SPACE INTENTIONALLY LEFT BLANK


STRUCTURAL FEATURES								TOTAL
SPACE INTENTIONALLY LEFT BLANK


				Page 11 of 24				© COPYRIGHT 2004 Deutsche Bank
	Washington Mutual 2000-1
	Mortgage Pass-Through Certificates

	Collateral Report for December 27, 2004 Distribution


	Collateral Report


COLLATERAL								TOTAL
	Loan Count:
	*Original*							17816
	Prior							3,642
	Prefunding							-
	Scheduled Paid Offs							-
	Full Voluntary Prepayments							(58)
	Repurchases							-
	Liquidations							(1)
	Current							3,583

	*Principal Balance:*
	Original							6,701,536,869.34
	Prior							1,100,123,453.92
	Prefunding							-
	Scheduled Principal							(2,953,837.27)
	Partial and Full Voluntary Prepayments							(18,133,190.75)
	Repurchases							-
	Liquidations							(250,805.48)
	Current							1,078,785,620.42

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				© COPYRIGHT 2004 Deutsche Bank
	Washington Mutual 2000-1
	Mortgage Pass-Through Certificates

	Collateral Report for December 27, 2004 Distribution


	Collateral Report


CHARACTERISTICS								TOTAL

	Weighted Average Coupon Original							7.423436%
	Weighted Average Coupon Prior							4.470189%
	Weighted Average Coupon Current							4.518269%
	Weighted Average Months to Maturity Original							332
	Weighted Average Months to Maturity Prior							274
	Weighted Average Months to Maturity Current							273
	Weighted Avg Remaining Amortization Term Original							-
	Weighted Avg Remaining Amortization Term Prior							274
	Weighted Avg Remaining Amortization Term Current							273
	Weighted Average Seasoning Original							-
	Weighted Average Seasoning Prior							122.09
	Weighted Average Seasoning Current							123.09

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				© COPYRIGHT 2004 Deutsche Bank
	Washington Mutual 2000-1
	Mortgage Pass-Through Certificates

	Collateral Report for December 27, 2004 Distribution


	Collateral Report


ARM CHARACTERISTICS								TOTAL

	Weighted Average Margin Original							0.000%
	Weighted Average Margin Prior							2.425%
	Weighted Average Margin Current							2.423%
	Weighted Average Max Rate Original							0.000%
	Weighted Average Max Rate Prior							13.441%
	Weighted Average Max Rate Current							13.459%
	Weighted Average Min Rate Original							0.000%
	Weighted Average Min Rate Prior							3.188%
	Weighted Average Min Rate Current							3.186%
	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							257,122.82
	Delinquent Servicing Fees							86,665.76

	TOTAL SERVICING FEES							343,788.58

	Total Servicing Fees							343,788.58
	Compensating Interest							0.00

	Delinquent Servicing Fees							(86,665.76)

	COLLECTED SERVICING FEES							257,122.82

	Current PPIS							0.00
	Current Net PPIS							0.00

	Total Advanced Principal For Current Payment Date							718,267.96
	Total Advanced Interest For Current Payment Date							966,884.83
	TOTAL ADVANCES FOR CURRENT PERIOD							1,685,152.79


ADDITIONAL COLLATERAL INFORMATION								TOTAL
SPACE INTENTIONALLY LEFT BLANK


				Page 14 of 24				© COPYRIGHT 2004 Deutsche Bank
	Washington Mutual 2000-1
	Mortgage Pass-Through Certificates

	Delinquency Report for December 27, 2004 Distribution


	Delinquency Report - Total


				<1 PAYMENT	1 PAYMENT	2 PAYMENTS	3+ PAYMENTS	TOTAL
DELINQUENT		Balance			7,213,781.46	1,087,530.52	1,006,636.69	9,307,948.67
		% Balance			0.67%	0.10%	0.09%	0.86%
		# Loans			25	2	3	30
		% # Loans			0.70%	0.06%	0.08%	0.84%
FORECLOSURE		Balance		350,252.29	-	-	4,626,651.43	4,976,903.72
		% Balance		0.03%	0.00%	0.00%	0.43%	0.46%
		# Loans		1	-	-	11	12
		% # Loans		0.03%	0.00%	0.00%	0.31%	0.33%
BANKRUPTCY		Balance		2,290,102.73	250,341.78	-	1,629,963.86	4,170,408.37
		% Balance		0.21%	0.02%	0.00%	0.15%	0.39%
		# Loans		7	1	-	4	12
		% # Loans		0.20%	0.03%	0.00%	0.11%	0.33%
REO		Balance		-	-	-	1,178,167.02	1,178,167.02
		% Balance		0.00%	0.00%	0.00%	0.11%	0.11%
		# Loans		-	-	-	2	2
		% # Loans		0.00%	0.00%	0.00%	0.06%	0.06%

TOTAL		Balance		2,640,355.02	7,464,123.24	1,087,530.52	8,441,419.00	19,633,427.78
		% Balance		0.24%	0.69%	0.10%	0.78%	1.82%
		# Loans		8	26	2	20	56
		% # Loans		0.22%	0.73%	0.06%	0.56%	1.56%
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				© COPYRIGHT 2004 Deutsche Bank
	Washington Mutual 2000-1
	Mortgage Pass-Through Certificates

	REO Report for December 27, 2004 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	Principal	Paid to	Note	LTV at	Original	Origination
Loan Group		Balance	Balance	Date	Rate	Origination	Term	Date
SPACE INTENTIONALLY LEFT BLANK


				Page 16 of 24				© COPYRIGHT 2004 Deutsche Bank
	Washington Mutual 2000-1
	Mortgage Pass-Through Certificates

	Prepayment Report for December 27, 2004 Distribution


	Prepayment Report - Voluntary Prepayments


VOLUNTARY PREPAYMENTS								TOTAL

	*Current*
	Number of Paid in Full Loans							58
	Number of Repurchased Loans							-
	Total Number of Loans Prepaid in Full							58

	Paid in Full Balance							17,055,542.14
	Repurchased Loans Balance							-
	Curtailments Amount							1,077,648.61
	Total Prepayment Amount							18,133,190.75

	*Cumulative*
	Number of Paid in Full Loans							9,236
	Number of Repurchased Loans							-
	Total Number of Loans Prepaid in Full							9,236

	Paid in Full Balance							5,174,524,552.59
	Repurchased Loans Balance							-
	Curtailments Amount							196,507,961.02
	Total Prepayment Amount							5,371,032,513.61

SPACE INTENTIONALLY LEFT BLANK


Total Prepayments by Groups (in thousands of dollars)					Total Prepayments (in thousands of dollars)


				Page 17 of 24				© COPYRIGHT 2004 Deutsche Bank
	Washington Mutual 2000-1
	Mortgage Pass-Through Certificates

	Prepayment Report for December 27, 2004 Distribution


	Prepayment Report - Voluntary Prepayments


VOLUNTARY PREPAYMENT RATES								TOTAL

	SMM							1.65%
	3 Months Avg SMM							1.77%
	12 Months Avg SMM							2.38%
	Avg SMM Since Cut-off							2.97%

	CPR							18.13%
	3 Months Avg CPR							19.30%
	12 Months Avg CPR							25.14%
	Avg CPR Since Cut-off							30.38%

	PSA							302.09%
	3 Months Avg PSA Approximation							321.59%
	12 Months Avg PSA Approximation							418.97%
	Avg PSA Since Cut-off Approximation							506.34%







CPR by Groups					Total CPR


PSA by Groups					Total PSA


				Page 18 of 24				© COPYRIGHT 2004 Deutsche Bank
	Washington Mutual 2000-1
	Mortgage Pass-Through Certificates

	Prepayment Report for December 27, 2004 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 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)
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				© COPYRIGHT 2004 Deutsche Bank


	Washington Mutual 2000-1
	Mortgage Pass-Through Certificates

	Realized Loss Report for December 27, 2004 Distribution


	Realized Loss Report - Collateral


COLLATERAL REALIZED LOSSES								TOTAL

	*Current*
	Number of Loans Liquidated							1
	Collateral Realized Loss/(Gain) Amount							-
	Net Liquidation Proceeds							250,805.48

	*Cumulative*
	Number of Loans Liquidated							1
	Collateral Realized Loss/(Gain) Amount							142,848.74
	Net Liquidation Proceeds							107,956.74

	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				© COPYRIGHT 2004 Deutsche Bank
	Washington Mutual 2000-1
	Mortgage Pass-Through Certificates

	Realized Loss Report for December 27, 2004 Distribution


	Realized Loss Report - Collateral


DEFAULT SPEEDS								TOTAL

	MDR							0.02%
	3 Months Avg MDR							0.01%
	12 Months Avg MDR							0.00%
	Avg MDR Since Cut-off							0.00%

	CDR							0.27%
	3 Months Avg CDR							0.09%
	12 Months Avg CDR							0.02%
	Avg CDR Since Cut-off							0.00%

	SDA							9.11%
	3 Months Avg SDA Approximation							3.04%
	12 Months Avg SDA Approximation							0.41%
	Avg SDA Since Cut-off Approximation							0.02%

	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				© COPYRIGHT 2004 Deutsche Bank
	Washington Mutual 2000-1
	Mortgage Pass-Through Certificates

	Realized Loss Report for December 27, 2004 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 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)
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				© COPYRIGHT 2004 Deutsche Bank


	Washington Mutual 2000-1
	Mortgage Pass-Through Certificates

	Realized Loss Detail Report for December 27, 2004 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 Current Realized Loss Amount = 0.00
Total Revisions Amount = 0.00
Total Realized Loss Amount = 0.00
Total Net Liquidation Proceeds = 250,805.48
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	Realized
Loan Group		Status	Rate	Origination	Term	Balance	Revisions	Loss/(Gain)	Loss/(Gain)
SPACE INTENTIONALLY LEFT BLANK


					Page 23 of 24				© COPYRIGHT 2004 Deutsche Bank
	Washington Mutual 2000-1
	Mortgage Pass-Through Certificates

	Additional Certificate Report for December 27, 2004 Distribution


	Additional Certificate Report


	CLASS			Carryforward Interest		Basis Risk Shortfall Reimbursed	Basis Risk Shortfall	Unpaid Basis Risk Shortfall

	A1			0.00		0.00	0.00	0.00
	A2			0.00		0.00	0.00	0.00
	M1			0.00		0.00	0.00	0.00
	M2			0.00		0.00	0.00	0.00
	M3			0.00		0.00	0.00	0.00
	B1			0.00		13,833.01	13,833.01	0.00
	B2			0.00		759.13	759.13	0.00


				Page 24 of 24				© COPYRIGHT 2004 Deutsche Bank

WASHINGTON MUTUAL MORT PS THR CERTS SER 2003-R1 8-K