If you are interested in becoming a Nike-authorized retailer, please review the information below to determine if an application is your next step. Allowance for Uncollectible Accounts. Receivable.Accounts receivable, net consist primarily of amounts receivable from customers. When should contract AR be entered into the Contract AR system? Contract AR should be entered when the revenue has been earned but not collected. Determine the following measures for the fiscal years ended May 31, 2018, and May 31, 2017. Accounts Receivable explanation, calculation, historical data and more. Once the cash receipt is processed the payment will be reflected against the respective contract number in the Contract AR system in the Cash Received column. Assistant Accounts Payable and Accounts Receivable.