Department of Human Services. Schedule D – Accounts Receivable – Contracts.Learn how to record retention receivable and payable, and why it can be essential for your construction business. Revenue generating agreements are contracts under which the University receives compensation for providing goods or services to a third party. An accounts receivable purchase agreement is a legally binding contract that governs the purchase of accounts receivable between parties in a specific location. Accounts Receivable. Receivables for contracts (ensure timely payments as per contracts). Complete and return contract lien waivers. To purchase services for your company, please complete the Illinois Registered Agent Required Info form. Receivables purchase agreements deal with accounts receivable or when a business bills out for goods and services.