A system and method for facilitating automatic reconciliation of transaction card transactions is disclosed, wherein a user may request single-use account codes via the Internet. The system comprises various hardware and software systems to enable a card member, program administrator, or any other designated third-party to request one or more single-use account codes. The requestor may further assign a descriptor for each of the one or more account codes. After receiving a requested account code, the requester may communicate the account code to a merchant to facilitate a purchase transaction. The system retrieves a list of transactions from the card issuer at regular intervals, matches the account codes in the list to an account code and associated descriptor, and records the reconciled transaction within a database.