There are several reasons why you might not receive your payment on the first: your case circumstances, mail delivery, volume of payments we receive, payment method and accuracy of the information we receive. For example, when someone pays early, our computer system will establish the amount due on the night of the 31st, the payment is recognized on the first and the check mailed on the second. We work to ensure that once your payment reaches us, the payment will be posted and distributed within two working days or less.