An accounts receivable purchase agreement is a legally binding contract that governs the purchase of accounts receivable between parties in a specific location. Attached is an Accounts Receivable Assignment Agreement to formally assign the rights to the Accounts.A receivables financing agreement is a type of financial transaction in which a business sells its accounts receivable (invoices) to a third party. When buying accounts receivable, purchasers must comply with Article 9 of the New York Uniform Commercial Code (UCC) in order to record the change in ownership. Hybrid- New York, NY Ancillary Benefits Must haves:. When selling your receivables, a factoring company like altLINE won't require collateral. An accounts receivable purchase agreement is a legally binding contract that governs the purchase of accounts receivable between parties in a specific location. To make it easier to understand, we've outlined the steps below. In addition, before the contract is even signed, it is important to perform due diligence regarding the creditworthiness of your customers.