Method and system for matching an electronic sales receipt to a user for a customer purchase transaction

A method of matching transaction data and sales receipt data to a user for a customer purchase transaction, the method comprising:

• a merchant computing system receiving payment instrument information via a payment instrument provided to complete payment for the customer purchase transaction comprising at least one of:
• a Primary Account Number (PAN), a token corresponding to the PAN, or PAN derivatives;
• the merchant computing system communicating the payment instrument information to a payment processor computing system;
• the payment processor computing system:
• processing payment;
• storing payment data for the purchase transaction comprising a total billable amount without a line-item breakdown in a payment processor datastore including reference to a customer Payment Account Reference (PAR), wherein the PAR identifies the user and not the payment instrument;
• and
• confirming processing of the payment with the merchant computing system;
• the merchant computing system:
• completing the purchase transaction;
• and
• storing sales receipt data comprising line-item level data in a merchant datastore;
• a sales receipt computing system, on which the customer PAR associated with the user is stored, receiving the payment data generated by the payment processor computing system, wherein the user is identified by the customer PAR and not by the payment instrument;
• the sales receipt computing system receiving the sales receipt data generated by the merchant computing system;
• and
• the sales receipt computing system matching the payment data and the sales receipt data with the user using the customer PAR identifying the user and without requiring the payment instrument or payment instrument information comprising a PAN or a token corresponding to the PAN or PAN derivatives, wherein the matching enables issuance of an electronic sales receipt to the user.