Document:

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                                                                    Exhibit 10.3
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                                                                    May 24, 2000

Advanta Mortgage Loan Trust 2000-1 (the "Trust")
c/o Bankers Trust Company of California, N.A.
1761 East St. Andrew Place
Santa Ana, CA 92705

Ambac Assurance Corporation
One State Street Plaza
New York, New York 10004

         Re:      Pooling and Servicing Agreement dated as of May 1, 2000 (the
                  "Pooling and Servicing Agreement") among Advanta Conduit
                  Receivables, Inc., as sponsor (the "Sponsor"), Advanta
                  Mortgage Corp. USA ("AMCUSA"), as master servicer (the "Master
                  Servicer"), and Bankers Trust Company of California, N.A. as
                  trustee (the "Trustee") and the Mortgage Loan Transfer
                  Agreement dated as of May 1, 2000 (the "Transfer Agreement")
                  among the Sponsor, the Trustee and the originators named
                  therein (the "Originators")

Ladies and Gentlemen:

                  Pursuant to the Pooling and Servicing Agreement and the
Transfer Agreement (together, the "Agreements"), AMCUSA in its capacity as
Master Servicer, has undertaken certain financial obligations with respect to
its servicing of the Mortgage Loans, including, but not limited to, the making
of Delinquency Advances and Servicing Advances. In addition, the Sponsor and the
Originators have, in the Agreements undertaken certain financial obligations,
including, but not limited to, the payment of the Loan Purchase Price relating
to the repurchase of non-qualifying Mortgage Loans, the payment of Substitution
Amounts in connection with the substitution of Qualified Replacement Mortgages
and the payment of certain expenses of the Trust. Any financial obligations of
AMCUSA, the Sponsor or any Originator under either of the Agreements, whether or
not specifically enumerated in this paragraph, are hereinafter referred to as
the "Joint and Several Obligations"; provided, however, that "Joint and Several
Obligations" shall mean only the financial obligations of AMCUSA, the Sponsor or
any Originator under either of the Agreements (including the payment of money
damages for a breach of any of AMCUSA's, the Sponsor's or any Originator's
obligations under either of the Agreements, whether financial or otherwise) but
shall not include any obligations not relating to the payment of money (e.g.,
the obligation to service the Mortgage Loans).

                  The Certificate Insurer has required the undersigned, Advanta
Mortgage Holding Company ("AMHC"), the parent corporation of AMCUSA and the
indirect
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corporate parent of the Sponsor, to acknowledge its joint-and-several liability
with AMCUSA, the Sponsor and the Originators for the payment of the Joint and
Several Obligations under the Agreements.

                  Now, therefore, the Trust, the Certificate Insurer and AMHC do
hereby agree that:

                  (i)      AMHC hereby agrees to be absolutely and
                           unconditionally jointly and severally liable with
                           AMCUSA, the Sponsor and the Originators to the Trust
                           and the Certificate Insurer for the payment of the
                           Joint and Several Obligations.

                  (ii)     AMHC may honor its obligations hereunder either by
                           direct payment of any Joint and Several Obligations
                           or by causing any Joint and Several Obligations to be
                           paid to the Trust and the Certificate Insurer by
                           AMCUSA, the Sponsor, any Originator or another
                           affiliate of AMHC.

                  [Remainder of Page Intentionally Left Blank]
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                  Capitalized terms used herein and not defined herein shall
have their respective meanings as set forth in the Agreements.

                             Very truly yours,

                             ADVANTA MORTGAGE
                              HOLDING COMPANY

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

Acknowledged and Agreed:

ADVANTA MORTGAGE LOAN
  TRUST, 2000-1, by Bankers Trust
  Company of California, N.A., as Trustee

By: /s/ Mark McNeill
   ----------------------------------------
     Name:   Mark McNeill
     Title:  Assistant Secretary

Acknowledged:

AMBAC ASSURANCE CORPORATION

By: /s/ Thomas J. Adams
   ----------------------------------------
     Name:   Thomas J. Adams
     Title:  First Vice President

Dated:  May 24, 2000

                             [Guaranty to the Trust]<PAGE>   1

                                                                    Exhibit 10.8

                                 PROMISSORY NOTE

Roseland, New Jersey                              $1,000,000.00
                                                  together with interest at
                                                  the rate of 7% per annum

                                                  November 30, 1998

                  ON DEMAND, and for value received, the undersigned, Patrick
Lombardi and Louis Lombardi, promise to pay to the order of COOPERATIVE
COMMUNICATIONS, INC., the sum of One Million dollars and no cents
($1,000,000.00) with interest at the rate of Seven Percent (7%) per annum, from
the date hereof until fully paid. Same shall be for Thirty (30) years in 360
equal and consecutive monthly installments of $6,653.10 which includes interest
at the rate aforesaid. Payments shall be made at 420 Washington Avenue,
Belleville, New Jersey unless the holder notifies the makers in writing of a
different designated payment location. The first payment due hereunder shall be
December , 1998 and on the like day of each succeeding month thereafter until
fully paid.

                  1. We hereby waive presentment for payment, demand, notice of
non-payment, protest and notice of protest.

                  2. The unpaid balance of this loan may be prepaid in full at
any time without penalty as well as in installments of amounts no less than
$1000.00 each.

                  3. The following shall constitute events of default under this
note:

                  A. The failure to pay the holder hereof any sums owed after
due demand for payment has been made.

                  4. Remedies on default that are not exclusive but are in
addition to any other legal or equitable relief the holder may have or be
entitled to under any Federal or State Statute or equitable principal.

                  A. If an event of default described above occurs, the holder
hereof shall have the right to declare all of the principal balance and all of
the accrued but unpaid interest immediately due and payable.

                  5. No extension, modification or waiver of any term or
condition of this note shall be valid or binding upon the holder unless it is in
writing and signed by the holder.

                  6. The maker hereby waives presentment, demand for payment,
protest, notice of protest, notice of dishonor, all defenses, set-offs and
counterclaims that it might have against the payee or any holder of this note,
except for (1) limitation on maker's liability that extends only to the value of
the makers equity in the real estate which is collateralizing this promissory
note; and (2) while payee remains as a tenant of the premises, they have an
obligation to pay rent in accordance with the terms and conditions of a lease
agreement with the makers of this Note. In the event they do not pay rent nor
comply with the terms of said Note, those actions shall constitute a right of
set off to the makers, and makers failure to make payments hereunder in the
event of payee's noncompliance with the lease terms shall not constitute a
default hereunder.

                  7. This note is secured by real estate mortgage dated November
1998 on real property described therein and located at 420 Washington Avenue in
the Township of Belleville, County of Essex, New Jersey. In the event of any
default under this Note, then in addition to all other remedies the holder may
have, the mortgagee may institute foreclosure proceedings on the mortgages.

WITNESS:

                                        /s/ Patrick Lombardi
                                        --------------------
                                            PATRICK LOMBARDI

                                        /s/ Louis Lombardi
                                        --------------------
                                            LOUIS LOMBARDI

/s/ Joyce Gumina
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                                                                    Exhibit 10.9

                 AMENDMENT NO. 1 TO LEASE OF PORTION OF PREMISES
                          AT 412-420 WASHINGTON AVENUE,
                          BELLEVILLE, NEW JERSEY 07109

         Effective as of December 1, 1998, the undersigned hereby amend that
certain Lease of Portion of Premises at 412-420 Washington Avenue, Belleville,
New Jersey 07109, dated as of December 1, 1998, as follows:

         1.       Section 1.1 shall read in its entirety:

                  "Demise and Premises. Landlord hereby leases to Tenant and
                  Tenant hereby rents from Landlord certain premises, including
                  a parking area (the "Premises"), known as 412-420 Washington
                  Avenue, Belleville, Essex County, New Jersey and as
                  particularly delineated on EXHIBIT A Annexed hereto."

         2.       Section 2.1 shall read in its entirety:

                  "Term. The term of this Lease shall be for a period of twenty
                  (20) years, commencing and expiring in accordance with this
                  Article."

         IN WITNESS WHEREOF, Landlord and Tenant have executed this Amendment as
of the day and year first above written.

WITNESS:                                    LANDLORD:

/s/ Dawn B. Androsky                        /s/ Louis Lombardi, Sr.
------------------------                    -----------------------------
    DAWN B. ANDROSKY                            LOUIS LOMBARDI, SR.

/s/ Jay Brzezanski                          /s/ Theresa M. Lombardi
------------------------                    ------------------------------
    JAY BRZEZANSKI                              THERESA LOMBARDI, as
                                                Executrix of the estate of
                                                Patrick Lombardi

ATTEST:                                     TENANT:

                                            COOPERATIVE COMMUNICATIONS, INC.

/s/ Louis Lombardi, Jr.                     /s/ Louis Lombardi, Sr.
------------------------                    ------------------------------
    LOUIS LOMBARDI, Jr.                         LOUIS LOMBARDI, Sr.
    Vice President and Secretary                President

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