All revenue contracts must first be entered in the Contracting System. An accounts receivable purchase agreement is a contract between a buyer and seller.The seller sells receivables and the buyer collects the receivables. This statement reports the amount of interest that the State Controller paid to a claimant in the tax year that the unclaimed property account was paid. An accounts receivable purchase agreement is a legally binding contract that governs the purchase of accounts receivable between parties in a specific location.