<PAGE>

                                                                Exhibit 99.1 (i)
[PriceWaterhouseCoopers Letterhead]

                                                     PriceWaterhouseCoopers LLP
                                                     1177 Avenue of the Americas
                                                     New York NY 10036
                                                     Telephone 646 471 4000


                        Report of Independent Accountants


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
("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, 2002 included in the accompanying management
assertion (see Exhibit I). The Company performs loan subservicing functions for
the residential loan servicing portfolios of its affiliates Chase Mortgage
Company and 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 entity'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 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 standards.

In our opinion, management's assertion that the Company complied with the
aforementioned standards as of and for the year ended December 31, 2002 is
fairly stated, in all material respects.





March 19, 2003


<PAGE>

                                                                       Exhibit I

                  Management's Assertion Concerning Compliance
                      with USAP Minimum Servicing Standards


March 19, 2003


As of and for the year ended December 31, 2002, Chase Manhattan Mortgage
Corporation ("CMMC") and Chase Mortgage Company ("CMC") and their 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                        /s/ Terry L. Gentry
-------------------------------------    ----------------------------------
Steve Rotella                            Terry L. Gentry
Chief Executive Officer                  Senior Vice President of Servicing




/s/ Glenn Mouridy                        /s/ Lucy Gambino
-------------------------------------    ----------------------------------
Glenn Mouridy                            Lucy Gambino
Executive Vice President of Servicing    Vice President of Risk Management


<PAGE>

                                                                Exhibit 99.1(ii)

                           [GRANT THORNTON LETTERHEAD]


                REPORT OF INDEPENDENT ACCOUNTANTS OF MANAGEMENT'S
            ASSERTION ON COMPLIANCE WITH MINIMUM SERVICING STANDARDS
             SET FORTH IN THE UNIFORM SINGLE ATTESTATION PROGRAM FOR
                                MORTGAGE BANKERS



Board of Directors
Countrywide Financial Corporation


We have examined management's assertion about Countrywide Financial Corporation
(formerly Countrywide Credit Industries, Inc.) and Subsidiaries' (including its
wholly-owned subsidiary, Countrywide Home Loans, Inc. ("CHL") and Countrywide
Home Loans Servicing, L.P., a wholly-owned subsidiary of CHL) (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, 2002 included in the
accompanying management assertion. 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 entity'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 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 Countrywide Financial Corporation
and Subsidiaries (including its wholly-owned subsidiary, Countrywide Home Loans,
Inc., and Countrywide Home Loans Servicing, L.P., a wholly-owned subsidiary of
CHL) complied with the aforementioned minimum servicing standards as of and for
the year ended December 31, 2002 is fairly stated, in all material respects,
except as disclosed in the attached Schedule of Findings.

/s/ Grant Thornton LLP

Los Angeles, California
February 28, 2003

<PAGE>


                        Countrywide Financial Corporation

                              SCHEDULE OF FINDINGS

                                December 31, 2002



Statement of Condition:

Interest on payoffs for four (4) states was not properly credited to the
mortgagor per the respective state law due to a programming error that was not
correctly identifying when the Company should be paying, or crediting, the
mortgagor.

Criteria:

The Uniform Single Attestation Program for Mortgage Bankers, Section V, Item 4,
requires that interest on escrow accounts shall be paid, or credited, to
mortgagors in accordance with the applicable state laws.

Effect:

The Company was not properly paying, or crediting, the mortgagors for interest
on payoffs during the year ended 2002.

Recommendation:

The Company should identify all borrowers who are affected and refund the
interest immediately. The Company should also remedy the programming error so
that the system will properly identify when the mortgagor should be paid, or
credited, for the interest on payoffs.

Corrective Action Plan:

The Company investigated this matter and identified the programming error. The
programming error was corrected as of February 10, 2003. The Company identified
all mortgagors affected and will send a refund to each customer that would have
received a refund at payoff had the error not occurred. The Company expects
payment to the mortgagors to occur by April 30, 2003. The Company's Legal
Department is also revalidating the interest on escrow rules for all states. The
Company's Internal Audit Department will be performing testing in this area to
ensure proper interest credit to mortgagors where applicable.

<PAGE>

                            [Countrywide Letterhead]



February 28, 2003


Grant Thornton LLP
1000 Wilshire Boulevard
Suite 300
Los Angeles, CA 90017

Gentlemen:

As of and for the year ended December 31, 2002, Countrywide Financial
Corporation (formerly Countrywide Credit Industries, Inc.,) and Subsidiaries
(which includes its wholly-owned subsidiary, Countrywide Home Loans, Inc.
("CHL"), and Countrywide Home Loans Servicing, L.P., a wholly owned subsidiary
of CHL) (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 for Mortgage Bankers, except as disclosed in the
attached Schedule of Findings to the report. As of and for this same period, the
Company had in effect a fidelity bond and errors and omissions policy in the
amount of $215 million and $240 million, respectively.

The Company investigated the matter noted in the Schedule of Findings and
identified a programming error. The programming error was corrected as of
February 10, 2003. The Company identified all mortgagors affected and will send
a refund to each customer that would have received a refund at payoff had the
error not occurred. The Company expects payment to the mortgagors to occur by
April 30, 2003. The Company's Legal Department is also revalidating the interest
on escrow rules for all states. The Company's Internal Audit Department will be
performing testing in this area to ensure proper interest credit to mortgagors
where applicable.

Sincerely,

/s/ Thomas K. McLaughlin
------------------------
Thomas K. McLaughlin
Senior Managing Director and
Chief Financial Officer

<PAGE>

                                                               Exhibit 99.1(iii)

                         [Deloitte & Touche Letterhead]

INDEPENDENT ACCOUNTANTS' REPORT


Board of Directors and Stockholders
Washington Mutual Mortgage Securities Corp.

We have examined management's assertion, included in the accompanying
Management's Assertion Concerning Compliance with Washington Mutual Mortgage
Securities Corp.'s Minimum Servicing Standards, that Washington Mutual Mortgage
Securities Corp. (WMMSC) complied with the minimum servicing standards in its
role as Master Servicer as of and for the year ended December 31, 2002. Such
assertions were examined relating to those series of certificates included in
the attached Exhibit 1. Management is responsible for WMMSC's compliance with
those minimum servicing standards. Our responsibility is to express an opinion
on management's assertion about WMMSC'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 WMMSC's
compliance with its minimum servicing standards and performing such other
procedures as we considered necessary in the circumstances. Series of
certificates subject to such procedures were selected using sampling methods,
and accordingly, we make no representations that our examination procedures were
performed on a specific series of certificates as listed in the attached Exhibit
1. We believe that our examination provides a reasonable basis for our opinion.
Our examination does not provide a legal determination on WMMSC's compliance
with its minimum servicing standards.

In our opinion, management's assertion that WMMSC complied with the
aforementioned minimum servicing standards as of and for the year ended December
31, 2002, is fairly stated, in all material respects.

/s/ Deloitte & Touche LLP

February 20, 2003



<PAGE>

WASHNGTON MUTUAL MORTGAGE SECURITIES CORP.

Exhibit I

Pool                       Series
Number                     Name

1663                       2000-CMC-01