This form is intended for use with the. This Addendum is intended for use in the unincorporated portions of Contra Costa County.A payment plan agreement outlines an installment plan to repay an outstanding balance over a specified time frame. Request for Copy of Notice of Default and Sale. You must comply with the following to keep the plan in good standing: (1). , County will pay Contractor for services rendered under the contract as specified in the attached Payment Schedule. Follow the instructions in this packet for serving the Findings and Order After Hearing on the other party. Blank forms are attached.