Abstract: Matching refunds to the appropriate payment instrument employed in a proxy card transaction comprises receiving a first payment authorization request for a transaction between a merchant and a user, the payment authorization request comprising an identification of an account of the user and an identifier for the transaction, the user account having associated therewith a plurality of payment instruments available for conducting payment transactions; determining a particular payment instrument with which to conduct the transaction; associating the transaction identifier with the particular payment instruments utilized in the transaction; receiving a first refund instruction to refund all or a portion of a payment amount of the transaction, the first refund instruction comprising the transaction identifier; determining the particular payment instrument associated with the transaction identifier provided in the first refund instruction; and initiating the refund to the particular payment instrument determined to