You also note that payment you made of $100 on May 5, 2015, is not shown on the statement either. The date of the mystery charge and the date that you made your payment at the store are the same, May 5, 2015. You think that the clerk mistakenly entered your payment as a purchase. You still have the receipt from your payment on your account. The receipt is number ... which was initialed by a "RMB".