Document:

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                                                                     Exhibit 4.2
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<TABLE>
<S>                                         <C>
AMBAC                                       Ambac Assurance Corporation
                                            c/o CT Corporation
                                            44 East Mifflin Street, Madison, Wisconsin 53703
                                            Administrative Office:
CERTIFICATE GUARANTY INSURANCE POLICY       One State Street Plaza, New York, New York 10004
                                            Telephone:  (212) 668-0340
</TABLE>

                                                 Policy Number:  AB0384BE
Insured Obligation:
Advanta Mortgage Loan Trust 2000-2,
Mortgage Loan Asset-Backed Certificates,
 Series 2000-2, Class A
                                                 Premium:
                                                 As specified in the endorsement
                                                 attached hereto.

AMBAC ASSURANCE CORPORATION (AMBAC) A Wisconsin Stock Insurance Company in
consideration of the payment of the premium and subject to the terms of this
Policy, hereby agrees unconditionally and irrevocably to pay to the Trustee for
the benefit of the Holders of the Insured Obligations, that portion of the
Insured Amounts which shall become Due for Payment but shall be unpaid by reason
of Nonpayment.

Ambac will make such payments to the Trustee from its own funds on the later of
(a) one (1) Business Day following notification to Ambac of Nonpayment or (b)
the Business Day on which the Insured Amounts are Due for Payment. Such payments
of principal or interest shall be made only upon presentation of an instrument
of assignment in form and substance satisfactory to Ambac, transferring to Ambac
all rights under such Insured Obligations to receive the principal of and
interest on the Insured Obligation. Ambac shall be subrogated to all the
Holders' rights to payment on the Insured Obligations to the extent of the
insurance disbursements so made. Once payments of the Insured Amounts have been
made to the Trustee, Ambac shall have no further obligation hereunder in respect
of such Insured Amounts.

In the event the Trustee for the Insured Obligations has notice that any payment
of principal or interest on an Insured Obligation which has become Due for
Payment and which is made to a Holder by or on behalf of the Trustee has been
deemed a preferential transfer and theretofore recovered from its Holder
pursuant to the United States Bankruptcy Code in accordance with a final,
nonappealable order of a court of competent jurisdiction, such Holder will be
entitled to payment from Ambac to the extent of such recovery if sufficient
funds are not otherwise available.

This Policy is noncancelable by Ambac for any reason, including failure to
receive payment of any premium due hereunder. The premium on this Policy is not
refundable for any reason. This Policy does not insure against loss of any
prepayment or other acceleration payment which at any time may become due in
respect of any Insured Obligation, other than at the sole option of Ambac, nor
against any risk other than Nonpayment, including failure of the Trustee to make
any payment due Holders of Insured Amounts.

To the fullest extent permitted by applicable law, Ambac hereby waives and
agrees not to assert any and all rights and defenses, to the extent such rights
and defenses may be available to Ambac, to avoid payment of its obligations
under this Policy in accordance with the express provisions hereof.

Any capitalized terms not defined herein shall have the meaning given such terms
in the endorsement attached hereto or in the Agreement.

In witness whereof, Ambac has caused this Policy to be affixed with its
corporate seal and to be signed by its duly authorized officers in facsimile to
become effective as their original signatures and binding upon Ambac by virtue
of the countersignature of its duly authorized representative.

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<S>                                              <C>
/s/ P. Lassiter                                  /s/ Stephen D. Cooke
---------------                                  --------------------
President                                        Secretary

                                                 /s/ [Authorized Representative]
                                                 -------------------------------
Effective Date: August 22, 2000                  Authorized Representative
               ----------------
</TABLE><PAGE>   1
                                                                     Exhibit 4.3
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                              CONVEYANCE AGREEMENT

                  Advanta Mortgage Receivables, Inc., Advanta Mortgage Corp.
Midwest, Advanta Mortgage Corp. USA, Advanta National Bank and Advanta Bank
Corp., (each, an "Originator"), and Advanta Conduit Receivables, Inc., as
sponsor, pursuant to the Mortgage Loan Transfer Agreement, dated as of August 1,
2000 (the "Transfer Agreement"), among themselves and Bankers Trust Company of
California, N.A., as trustee (the "Trustee"), hereby confirm their understanding
with respect to the conveyance by each Originator of those Mortgage Loans listed
on the attached Schedule of Mortgage Loans (the "Mortgage Loans") to the
Sponsor.

                  Conveyance of Mortgage Loans. Each Originator and the Sponsor,
concurrently with the execution and delivery of this Conveyance Agreement, does
hereby irrevocably transfer, assign, set over and otherwise convey to the
Sponsor and the Sponsor conveys to the Trustee, and does direct the Trustee to
convey to the Sponsor and/or the Advanta Mortgage Loan Trust 2000-2, without
recourse (except as otherwise explicitly provided for herein) all of its right,
title and interest in and to the Mortgage Loans being conveyed by it, including
specifically, without limitation, the Mortgages (as such term is defined in the
Pooling and Servicing Agreement, dated as of August 1, 2000 (the "Pooling and
Servicing Agreement") among the Sponsor, the Master Servicer and the Trustee),
the Notes, the Mortgage Files and all other documents, materials and properties
appurtenant thereto, including all interest accrued and principal received by
such Originator on or with respect to such Mortgage Loans on or after the
Cut-off Date, together with all of its right, title and interest in and to the
proceeds received on or after the Cut-off Date of any related Mortgage Insurance
Policies.

                  If an Originator cannot deliver the original Mortgage or
mortgage assignment with evidence of recording thereon within 75 days of the
execution and delivery of this Conveyance Agreement solely because of a delay
caused by the public recording office where such original Mortgage or mortgage
assignment has been delivered for recordation, such Originator shall promptly
deliver to the Trustee such original Mortgage or mortgage assignment with
evidence of recording indicated thereon upon receipt thereof from the public
recording official.

                  The costs relating to the delivery of the documents specified
in this Conveyance Agreement shall be borne by each Originator.

                  The Originators hereby make the Representations and Warranties
set forth in Section 5(b) of the Transfer Agreement with respect to the Mortgage
Loans.

                  The "Cut-off Date" with respect to such Mortgage Loans shall
be August 1, 2000.

                  All terms and conditions of the Transfer Agreement are hereby
incorporated herein, provided that in the event of any conflict the provisions
of this Conveyance Agreement shall control over the conflicting provisions of
the Transfer Agreement.
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                  Terms capitalized herein and not defined herein shall have
their respective meanings as set forth in the Transfer Agreement.

                  [Remainder of Page Intentionally left Blank]
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                  IN WITNESS WHEREOF, the parties hereto have caused this
Conveyance Agreement to be duly executed by their respective officers, all as of
the 22nd day of August, 2000.

                                     ADVANTA MORTGAGE RECEIVABLES, INC.
                                     ADVANTA MORTGAGE CORP. MIDWEST
                                     ADVANTA MORTGAGE CORP. USA,
                                     ADVANTA NATIONAL BANK,
                                                 as Originators

                                     By:  /S/ Michael Coco
                                        ----------------------------------------
                                     Name:  Michael Coco
                                     Title: Vice President

                                     ADVANTA CONDUIT
                                     RECEIVABLES, INC., as Sponsor

                                     By: /S/ Michael Coco
                                        ----------------------------------------
                                     Name:  Michael Coco
                                     Title: Vice President

                                     ADVANTA BANK CORP.,
                                     as an Originator

                                     By: /S/ Mark Hales
                                        ----------------------------------------
                                     Name:  Mark Hales
                                     Title: President

                                     BANKERS TRUST COMPANY
                                     OF CALIFORNIA, N.A., as Trustee

                                     By: /S/ Hermi Alignay
                                        ----------------------------------------
                                     Name:  Hermi Alignay
                                     Title: Assistant Secretary

                             [Conveyance Agreement]

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