Item 1. Business
Not applicable.
Item 2.
Item 2. Properties
Not applicable on reliance of Relief Letters
Item 3.
Item 3. Legal Proceedings
There were no legal proceedings.
Item 4.
Item 4. Submission of Matters to a Vote of Security Holders There were no matters submitted to a vote of the Security Holders.
PART II
Item 5.
Item 5. Market for Registrant's Common Equity and Related Stockholder matters
As of December 31, 2003, the Trust had Forty-seven (47) holders of record of the Notes, computed in accordance with Rule 12g5-1 under the Securities Exchange Act of 1934, as amended.
Item 6.
Item 6. Selected Financial Data.
Not applicable.
Item 7.
Item 7. Management's Discussion and Analysis of Financial Condition and Results of Operations.
Not applicable.
Item 8.
Item 8. Financial Statements and Supplementary Data.
Not applicable.
Item 9.
Item 9. Changes in and Disagreements with Accountants on Accounting and Financial Disclosure Information required by Item 304 of Reg. S-K.
Not applicable.
PART III
Item 10.
Item 10. Directors and Executive Officers of the Registrant
Not applicable.
Item 11.
Item 11. Executive Compensation
Not applicable.
Item 12.
Item 12. Security Ownership of Certain Beneficial Owners and Management
Not applicable.
Item 13.
Item 13. Certain Relationships and Related Transactions.
Not applicable.
Item 14.
Item 14. Principal Accounting Fees and Services.
Not applicable.
PART IV
Item 15.
Item 15. Exhibits, Financial Statement Schedules, and Reports on Form 8-K
(a) 1. Not Applicable 2. Not Applicable 3. Exhibits 99.1 Annual Statement of Compliance 		 (a) Ocwen Federal Bank FSB 		 (b) Chase Manhattan Mortgage Corporation 	 99.2 Report of Independent Accountants 		 (a) Ocwen Federal Bank FSB 		 (b) Chase Manhattan Mortgage Corporation 99.3 Report of Management 		 (a) Ocwen Federal Bank FSB 		 (b) Chase Manhattan Mortgage Corporation
(b) Reports on Form 8-K The registrant has filed Current Reports on Form 8-K with the Securities and Exchange Commission dated: July 25, 2003; August 25, 2003; September 25, 2003 October 27, 2003; November 25, 2003; December 26, 2003
(c) See (a) 3 above
(d) Not Applicable
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.
Credit Suisse First Boston Mortgage Securities Corp. Home Equity Asset Trust Mortgage Pass-Through Certificates, Series HEAT 2003-4
/s/ __Andrew Kimura_______________
Name: Andrew Kimura
Title: President
Company: Credit Suisse First Boston Mortgage Securities Corp.
Date: ____March 26, 2004__________
Sarbanes-Oxley Certification
I, __Andrew Kimura____________________, 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 Credit Suisse First Boston Mortgage Securities Corp. Home Equity Asset Trust Mortgage Pass-Through Certificates, Series HEAT 2003-4
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. Based on my knowledge and upon the annual compliance statement included in the report and required to be delivered to the trustee in accordance with the terms of the pooling and servicing, or similar, agreement, and except as disclosed in the reports, the servicer has fulfilled its obligations under the servicing 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.
In giving the certifications above, I have reasonably relied on information provided to me by the following unaffiliated parties:
U.S. Bank, National Association, as Trustee Chase Manhattan Mortgage Corporation, as Servicer Ocwen Federal Bank FSB, as Servicer
Date: ____March 26, 2004__________
Signature: /s/_Andrew Kimura___________
Company: Credit Suisse First Boston Mortgage Securities Corp.
Title: President
EXHIBIT INDEX
Exhibit Number Description 99.1 Annual Statement of Compliance 		 (a) Ocwen Federal Bank FSB 		 (b) Chase Manhattan Mortgage Corporation 99.2 Report of Independent Accountants 		 (a) Ocwen Federal Bank FSB 		 (b) Chase Manhattan Mortgage Corporation 99.3 Report of Management 		 (a) Ocwen Federal Bank FSB 		 (b) Chase Manhattan Mortgage Corporation
EXHIBIT 99.1 -- Servicer's Annual Statement of Compliance
(a)
Ocwen Ocwen Federal Bank FSB Compliance Certification Year Ended December 31, 2003 CSFB Home Equity Asset Trust 2003-4
The undersigned Officer of Ocwen Federal Bank FSB (the "Servicer") confirms that(i) a review of the activities of the Servicer during the calendar year ending on December 31, 2003 and of the performance of the Servicer under the Pooling and Servicing Agreement dated as of June 1, 2003 for the Home Equity Asset Trust 2003-4, Home Equity Pass-Through Certificates, Series 2003-4 (the "Servicing Agreement") has been made under his supervision. Except as noted on the Management Assertion on Compliance with USAP, to the best of the undersigned Officer's knowledge, based on such review, the Servicer has fulfilled all of its obligations as set forth in the Servicing Agreement.
By: /s/ Scott W. Anderson Scott W. Anderson, Senior Vice President		Dated: March 12, 2004
(b)
Chase Manhattan Mortgage Corporation 3415 Vision Drive Columbus.OH 43219
March 15, 2004
Ms. Beverly Thompson US Bank National Association 60 Livingston Avenue EPMNWS3D St. Paul MN 55107
RE: Annual Statements as to Compliance
Pursuant to that certain Pooling and Servicing Agreement ("Agreement") section 3.17 dated as of June 1,2003, Home Equity Asset Trust 2003-4, I, H. John Berens, hereby certify that (I) a review of the activities of the Servicer during the preceding year and the performance under this Agreement has been made under my supervision, and (II) to the best of my knowledge, based on such review, the Servicer has fulfilled all its obligations under this Agreement for such year.
Sincerely,
/s/ H. John Berens H. John Berens Senior Vice President
HJB/em
cc: Lucy Gambino
Enc.
EXHIBIT 99.2 -- Report of Independent Accountants
(a)
PriceWaterhouseCoopers			PricewaterhouseCoopers LLP 						222 Lakeview Avenue 						Suite 360 						West Palm Beach, Fl 33401 						Telephone (561) 832 0038 						Facsimile (561) 805 8181
INDEPENDENT CERTIFIED PUBLIC ACCOUNTANT'S REPORT
To the Board of Directors of Ocwen Federal Bank FSB
We have examined management's assertion, included in the accompanying Management Assertion on Compliance with USAP, that, except for the noncompliance related to reconciliations described in the third paragraph and the noncompliance related to interest on escrows described in the fifth paragraph, Ocwen Federal Bank FSB the "Bank") complied with the minimum servicing standards identified in the Mortgage Bankers Association of America's ("MBA's") Uniform Single Attestation Program for Mortgage Bankers ("USAP") as of and for the year ended December 31, 2003. Management is responsible for the Bank's compliance with those minimum servicing standards. Our responsibility is to express an opinion on management's assertion about the Bank's compliance based on our examination.
Our examination was made in accordance with standards established by the American Institute of Certified Public Accountants and, accordingly, included examining, on a test basis, evidence about the Bank's compliance with the minimum servicing standards and performing such other procedures as we consider 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 Bank's compliance with the minimum servicing standards.
Our examination disclosed noncompliance with minimum servicing standards related to account reconciliations and interest on escrows applicable to the Bank during the year ended December 31, 2003. Such noncompliance is described in the accompanying Management Assertion on Compliance with USAP.
In our opinion, management's assertion that the Bank complied with the aforementioned minimum servicing standards, except for noncompliance as described in the accompanying Management Assertion on Compliance with USAP, as of and for the year ended December 31, 2003 is fairly stated, in all material respects.
/s/ PriceWaterhouseCoopers LLP
March 12, 2004
(b)
PricewaterhouseCoopers LLP 11 77 Avenue of the Americas New York NY 10036 Telephone (646) 471 4000 Facsimile (813) 286 6000
Report of Independent Auditors
To the Board of Directors and Stockholder of Chase Manhattan Mortgage Corporation:
We have examined management's assertion about Chase Manhattan Mortgage Corporation's (the "Company") compliance with the minimum servicing standards identified 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, 2003 included in the accompanying management assertion (see Exhibit I). The Company performs loan subservicing functions for the residential loan servicing portfolio of its affiliate, Chase Mortgage Company West. 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 made 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 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, 2003 is fairly stated, in all material respects.
/s/ PricewaterhouseCoopers LLP
March 3, 2004
EXHIBIT 99.3 -- Report of Management
(a)
Ocwen MANAGEMENT ASSERTION ON COMPLIANCE WITH USAP
March 12, 2004
As of and for the year ended December 31, 2003, except as specifically noted below, Ocwen Federal Bank FSB (the "Bank") has complied in all material respects with the minimum servicing standards set forth in the Mortgage Bankers Association of America's ("MBA' s") Uniform Single Attestation Program for Mortgage Bankers ("USAP").
Standard: Reconciliations shall be prepared on a monthly basis for all custodial bank accounts and related bank clearing accounts. These reconciliations shall be mathematically accurate, be prepared within forty five (45) calendar days of the cutoff date; be reviewed and approved by someone other than the person who prepared the reconciliation; and document explanations for reconciling items. These reconciling items shall be resolved within ninety (90) calendar days of their original identification.
Certain reconciling items which arose during the year ended December 31, 2003 were not specifically identified and/or were not cleared within 90 days of their original identification. Management has developed and implemented an action plan and continues to resolve outstanding reconciling items. All significant reconciling items have been isolated and reviewed by the Company, and the Company believes these items will not have a material impact on the status of any custodial accounts.
Standard: Interest on escrow accounts shall be paid, or credited, to mortgagors in accordance with the applicable state laws.
Interest on escrow accounts in certain states was not paid, or credited, to mortgagors in accordance with the applicable state laws during the year ended December 31, 2003. The Bank has corrected the affected accounts by paying or crediting the appropriate interest on escrow. The Bank is currently implementing an enhancement to its REALServicingTM servicing system to ensure that, for loans collateralized by properties located in states that require the payment of interest on escrow accounts, the payment or crediting of such interest is in accordance with applicable state laws.
As of and for this same period, the Bank had in effect a fidelity bond in the amount of $15,000,000 and an errors and omissions policy in the amount of $5,000,000.
/s/ Ronald M. Faris Ronald M. Faris President
/s/ Scott W. Anderson Scott W. Anderson Senior Vice President of Residential Assets
/s/ Brian J. LaForest Brian J. LaForest Director of Investor Reporting
(b)
CHASE Chase Manhattan Mortgage Corporation 3415 Vision Drive Columbus OH 43219
Exhibit I
Management's Assertion Concerning Compliance with USAP Minimum Servicing Standards
March 3, 2004
As of and for the year ended December 31, 2003, Chase Manhattan Mortgage Corporation and its subsidiaries (collectively, the "Group") have complied in all material respects with the minimum servicing standards (the "standards") set forth in the Mortgage Bankers Association of America's Uniform Single Attestation Program for Mortgage Bankers ("USAP"). These standards are applicable only to Chase Manhattan Mortgage Corporation's prime and subprime mortgage portfolios.
As of and for this same period, the Group had in effect fidelity bond and errors and omissions policy in the amounts of $250,000,000 and $25,000,000 respectively.
/s/ Steve Rotella Steve Rotella Chief Executive Officer
/s/ Teny L. Gentry Teny L. Gentry Senior Vice President of Servicing
/s/ Lucy Gambino Lucy Gambino Vice President of Risk Management