Kindly take a few minutes to complete the Vendor. Vendor must submit invoices in a format where the invoice sequence matches the purchase order sequence.Vendor information in the table on Page 1; b. A Vendor Agreement is required in order to participate in and receive HEAP payments. One signed Agreement is required and applies to customers in your. THIS CONTRACT FOR SERVICES, including any attached addenda, if applicable (Contract) is effective as of July 1,. Section C: Monthly Statements. 1. This page is intended solely for informational purposes and should not be considered as an agreement or an amendment to any agreement. Your commissary agreement form must be provided at your pre-permit inspection. Vendor understands that no addendum or amendment.