Please click the link below for a downloadable sample letter. Sample Request Letter.This payment agreement template is written as a contract between two businesses. I am seeking an installment agreement due to financial hardship. A payment plan agreement outlines an installment plan to repay an outstanding balance over a specified time frame. To access the forms below, you will need Adobe Acrobat Reader. Why you received this notice. We received your installment agreement request to resolve your account. Installment Payment Plan Form. If you need a free Adobe® Reader® in order to read the PDF file, you can download one from the Adobe Web Page.