10-K 1 wfm0400z_2004.txt UNITED STATES SECURITIES AND EXCHANGE COMMISSION WASHINGTON, D.C. 20549 FORM 10-K (Mark one) /X/ ANNUAL REPORT PURSUANT TO SECTION 13 OR 15(d) OF THE SECURITIES EXCHANGE ACT OF 1934 For the fiscal year ended December 31, 2004 OR / / TRANSITION REPORT PURSUANT TO SECTION 13 OR 15(d) OF THE SECURITIES EXCHANGE ACT OF 1934 Commission File Number: 333-116509-17 Wells Fargo Asset Securities Corporation Mortgage Pass-Through Certificates Series 2004-Z (Exact name of registrant as specified in its charter) New York 54-2163830 (State or other jurisdiction of 54-2163831 incorporation or organization) (I.R.S. Employer Identification No.) c/o Wells Fargo Bank, N.A. 9062 Old Annapolis Road Columbia, MD 21045 (Address of principal executive offices) (Zip Code) Registrant's telephone number, including area code: (410) 884-2000 Securities registered pursuant to Section 12(b) of the Act: NONE. Securities registered pursuant to Section 12(g) of the Act: NONE. Indicate by check mark whether the registrant (1) has filed all reports required to be filed by Section 13 or 15(d) of the Securities Exchange Act of 1934 during the preceding 12 months (or for such shorter period that the registrant was required to file such reports), and (2) has been subject to such filing requirements for the past 90 days. Yes X No ___ Indicate by check mark if disclosure of delinquent filers pursuant to Item 405 of Regulation S-K ( 229.405 of this chapter) is not contained herein, and will not be contained, to the best of registrant's knowledge, in definitive proxy or information statements incorporated by reference in Part III of this Form 10-K or any amendment to this Form 10-K. Not applicable. Indicate by check mark whether the registrant is an accelerated filer (as defined in Exchange Act Rule 12b-2). Yes ___ No X State the aggregate market value of the voting and non-voting common equity held by non-affiliates computed by reference to the price at which the common equity was last sold, or the average bid and asked price of such common equity, as of the last business day of the registrant's most recently completed second fiscal quarter. Not applicable. Indicate the number of shares outstanding of each of the registrant's classes of common stock, as of the latest practicable date. Not applicable. Documents Incorporated by Reference List hereunder the following documents if incorporated by reference and the Part of the Form 10-K (e.g. Part I, Part II, etc.) into which the document is incorporated: (1)Any annual report to security holders; (2) Any proxy or information statement; and (3)Any prospectus filed pursuant to Rule 424(b) or (c) under the Securities Act of 1933. The listed documents should be clearly described for identification purposes (e.g. annual report to security holders for fiscal year ended December 24, 1980). Not applicable. PART I Item 1. Business. Omitted. Item 2. Properties. See Item 15(a), Exhibits 99.1, 99.2, and 99.3, for information provided in lieu of information required by Item 102 of Regulation S-K. Item 3. Legal Proceedings. The registrant knows of no material pending legal proceedings involving the trust created under the Pooling and Servicing Agreement (the Trust), the Trustee, the Servicer or the registrant with respect to the Trust other than routine litigation incidental to the duties of the respective parties. Item 4. Submission of Matters to a Vote of Security Holders. None. PART II Item 5. Market for registrant's Common Equity and Related Stockholder Matters and Issuer Purchases of Equity Securities. No established public trading market for the Certificates exists. Records provided to the Trust by the DTC and the Trustee indicate that as of December 31, 2004, the total number of holders of record for the Series of Certificates is 42. Item 6. Selected Financial Data. Omitted. Item 7. Management's Discussion and Analysis of Financial Condition and Results of Operation. Omitted. Item 7A. Quantitative and Qualitative Disclosures about Market Risk. Not applicable. Item 8. Financial Statements and Supplementary Data. See Item 15(a), Exhibits 99.1, 99.2, 99.3, for information provided in lieu of information required by Item 302 of Regulation S-K. Item 9. Changes in and Disagreements with Accountants on Accounting and Financial Disclosure. None. Item 9A. Controls and Procedures. Not applicable. Item 9B. Other Information. None. PART III Item 10. Directors and Executive Officers of the Registrant. Not applicable. Item 11. Executive Compensation. Not applicable. Item 12. Security Ownership of Certain Beneficial Owners and Management. Not applicable. Item 13. Certain Relationships and Related Transactions. Not applicable. Item 14. Principal Accounting Fees and Services. Not applicable. PART IV Item 15. Exhibits, Financial Statement Schedules. (a) Exhibits (31.1) Rule 13a-14(a)/15d-14(a) Certification (99.1) Annual Independent Accountants' Servicing Reports concerning servicing activities. ~~a) Wells Fargo Bank, N.A., as Servicer~~

(99.2) Report of Management as to Compliance with Minimum Servicing Standards. ~~a) Wells Fargo Bank, N.A., as Servicer~~

(99.3) Annual Statements of Compliance under the Pooling and Servicing Agreements. ~~a) Wells Fargo Bank, N.A., as Servicer~~

(99.4) Aggregate Statement of Principal and Interest Distributions to Certificate Holders. (b) Not applicable. (c) Omitted. (99.5) Reliance Certifications Mandated under the Pooling and Servicing Agreement for the year ended December 31, 2004 ~~a) Wells Fargo Bank, N.A., as Servicer~~

Filed herewith. Certification has been received. SIGNATURES Pursuant to the requirements of Section 13 or 15(d) of the Securities Exchange Act of 1934, the registrant has duly caused this report to be signed on its behalf by the undersigned, thereunto duly authorized: Wells Fargo Asset Securities Corporation Mortgage Pass-Through Certificates Series 2004-Z (Registrant) Signed: Wells Fargo Bank, N.A. as Master Servicer By: Robert Patelunas, Vice President By: /s/ Robert Patelunas, Vice President Dated: March 28, 2005 SUPPLEMENTAL INFORMATION TO BE FURNISHED WITH REPORTS FILED PURSUANT TO SECTION 15(d) OF THE ACT BY REGISTRANTS WHICH HAVE NOT REGISTERED SECURITIES PURSUANT TO SECTION 12 OF THE ACT. (a)(i) No annual report is provided to the Certificateholders other than with respect to aggregate principal and interest distributions. (a)(ii) No proxy statement, form of proxy or other proxy soliciting material has been sent to any Certificateholder with respect to any annual or other meeting of Certificateholders. Exhibit Index Exhibit No. Ex-31.1 Rule 13a-14(a)/15d-14(a) Certification I, Robert Patelunas, certify that: 1. I have reviewed this annual report on Form 10-K, and all reports on Form 8-K containing distribution or servicing reports filed in respect of periods included in the year covered by this annual report of Wells Fargo Asset Securities Corporation Mortgage Pass-Through Certificates, Series 2004-Z Trust; 2. Based on my knowledge, the information in these reports, taken as a whole, does not contain any untrue statement of a material fact or omit to state a material fact necessary to make the statements made, in light of the circumstances under which such statements were made, not misleading as of the last day of the period covered by this annual report; 3. Based on my knowledge, the distribution or servicing information required to be provided to the Trustee by the Servicer under the Pooling and Servicing or similar, agreement, for inclusion in these reports is included in these reports; 4. I am responsible for reviewing the activities performed by the master servicer under the pooling and servicing, or similar, agreement, and based upon my knowledge and the annual compliance review required under that agreement, and except as disclosed in the reports, the master servicer has fulfilled its obligations under that agreement; and 5. The reports disclose all significant deficiencies relating to the servicer's compliance with the minimum servicing standards based upon the report provided by an independent public accountant, after conducting a review in compliance with the Uniform Single Attestation Program for Mortgage Bankers or similar procedure, as set forth in the pooling and servicing, or similar, agreement, that is included in these reports. Date: March 28, 2005 /s/ Robert Patelunas Signature Vice President Title EX-99.1 (logo) KPMG KPMG LLP 2500 Ruan Center 666 Grand Avenue Des Moines, IA 50309 Independent Accountants' Report The Board of Directors Wells Fargo Home Mortgage, a division of Wells Fargo Bank, N.A.: We have examined management's assertion, included in the accompanying Assertion of Management of Wells Fargo Home Mortgage, a division of Wells Fargo Bank, N.A. (the Company), that the Company complied with the minimum servicing standards set forth in the Mortgage Bankers Association of America's Uniform Single Attestation Program for Mortgage Bankers (USAP) as of and for the year ended December 31, 2004. Management is responsible for the Company's compliance with those minimum servicing standards. Our responsibility is to express an opinion on management's assertion about the Company's compliance based on our examination. Our examination was conducted in accordance with attestation standards established by the American institute of Certified Public Accountants and, accordingly, included examining, on a test basis, evidence about the Company's compliance with the minimum servicing standards specified above and performing such other procedures, as we considered necessary in the circumstances. We believe that our examination provides a reasonable basis for our opinion. Our examination does not provide a legal determination on the Company's compliance with the minimum servicing standards. In our opinion, management's assertion that the Company complied with the aforementioned minimum servicing standards as of and for the year ended December 31, 2004 is fairly stated, in all material respects. /s/ KPMG LLP February 23, 2005 EX-99.2 (logo) Wells Fargo Home Mortgage 1 Home Campus Des Moines, IA 50328 Assertion of Management of Wells Fargo Home Mortgage, a division of Wells Fargo Bank, N.A As of and for the year ended December 31, 2004, Wells Fargo Home Mortgage, a division of Wells Fargo Bank, N.A. (the Company) has complied in all material respects with the minimum servicing standards set forth in the Mortgage Bankers Association of America's Uniform Single Attestation Program for Mortgage Bankers. As of and for this same period, the Company had in effect a fidelity bond along with an errors and omissions policy in the amounts of $100 million and $20 million, respectively. /s/ Michael J. Heid February 23, 2005 Michael J. Heid, Division President, Capital Markets, Finance, & Administration Wells Fargo Home Mortgage, a division of Wells Fargo Bank, N.A. /s/ Franklin R. Codel February 23. 2005 Franklin R. Codel, Executive Vice President, Finance and Corporate Real Estate Wells Fargo Home Mortgage, a division of Wells Fargo Bank, N.A. /s/ Michael Lepore February 23. 2005 Michael Lepore, Executive Vice President, Institutional Lending Wells Fargo Home Mortgage, a division of Wells Fargo Bank, N.A. /s/ Mary Coffin February 23, 2005 Mary Coffin, Executive Vice President, Servicing & Post Closing Wells Fargo Home Mortgage, a division of Wells Fargo Bank, N.A. Wells Fargo Home Mortgage Is a division of Wells Fargo Bank, N.A. EX-99.3 (logo) WELLS FARGO HOME MORTGAGE Wells Fargo Home Mortgage One Home Campus Des Moines, IA 50328-0001 March 1, 2005 Re: 2004 Annual Certification We hereby certify to the best of our knowledge and belief that for the calendar year of 2004: 1. All real estate taxes, bonds assessments and other lienable items have been paid. 2. All FHA mortgage insurance, private mortgage insurance premiums, and flood insurance have been paid (if applicable). 3. Hazard insurance policies held by us meet the requirements as specified in the servicing agreement, or those of a normal prudent lender if not specified, and those premiums due have been paid. 4. We have made all property inspections as required. 5. Fidelity bond and Errors and Omissions insurance coverage currently exists. 6. That the Officer signing this certificate has reviewed the activities and performance of the Servicer during the preceding fiscal year under the terms of the Servicing Agreement, Trust Agreement, Pooling and Servicing Agreement and/or Seller/Servicer Guide or similar agreements and to the best of this officer's knowledge, the Servicer has fulfilled all of its duties, responsibilities or obligations of such agreement throughout the year, or if there has been a default or failure of the servicer to perform any of such duties, responsibilities or obligations, a description of each default or failure and the nature and status thereof has been reported. Sincerely, /s/ John B. Brown John B. Brown Vice President Wells Fargo Home Mortgage Inc. Wells Fargo Home Mortgage is a division of Wells Fargo Bank, N.A. Ex-99.4 Schedule of Year-To-Date Principal and Interest Distributions to Certificateholders Class Interest Principal Losses Ending Balance B-1 75,058.34 4,802.99 0.00 19,500,197.01 B-2 37,531.09 2,401.62 0.00 9,750,598.38 B-3 22,515.58 1,440.77 0.00 5,849,559.23 B-4 22,515.58 1,440.77 0.00 5,849,559.23 B-5 7,507.76 480.42 0.00 1,950,519.58 B-6 10,008.10 640.42 0.00 2,600,110.03 I-A-1 1,123,815.68 1,833,811.29 0.00 287,316,188.71 I-A-2 81,164.25 132,441.57 0.00 20,750,558.43 II-A-1 2,856,528.23 15,882,039.63 0.00 728,870,960.37 II-A-2 727,069.57 4,265,048.85 0.00 195,734,951.15 II-A-R 0.38 100.00 0.00 0.00 II-A-IO 40,037.97 0.00 0.00 195,734,951.15

Wells Fargo Mortgage Backed Securities Series 2004-Z Trust 10-K