1. A computer implemented method comprising: receiving notification that a customer has installed a receipts management application associated with a retailer on a mobile electronic device; prompting, by the application, the customer to provide at least one piece of identifying information corresponding to the customer, wherein the identifying information is stored in a customer database; prompting, by a sales terminal of the retailer, the customer to provide the at least one piece of identifying information; sending, by the sales terminal to a receipts management server, the at least one piece of identifying information; identifying, by the receipts management server, the customer in the customer database based on the at least one piece of identifying information; facilitating, by the sales terminal, a purchase transaction by the customer; preparing, at the receipts management server, an electronic receipt for the purchase transaction; sending, by the receipts management server to the sales terminal, the electronic receipt; printing, at the sales terminal, a paper stub receipt containing a machine-readable code identifying the purchase transaction and associated with the electronic receipt, wherein the paper stub receipt is provided to the customer; preparing, at the receipts management server, a modified copy of the electronic receipt, wherein the modified copy of the electronic receipt has additional customer and transaction identifying information for use in conducting store audits and is stored in a receipt database at the receipts management server; transmitting, by the receipts management server, the modified copy of the electronic receipt to an audit electronic device; scanning, by the audit electronic device, the machine-readable code of the paper stub receipt; identifying, by the audit electronic device, the purchase transaction based on the machine-readable code; displaying, by the audit electronic device, the modified copy of the electronic receipt; and automatically eliminating the modified copy of the electronic receipt from the audit electronic device after a predetermined period of time.