Implementation Notes

Use the following notes as final implementation reminders when integrating the Card Details Update flow.

• Use the card’s publicToken when updating or retrieving card details.
• Send only the fields that need to be modified in the PATCH request.
• Do not assume fields omitted from the request were cleared. Omitted fields remain unchanged.
• After a successful update, retrieve the latest card record before displaying the result to the cardholder.
• Use the retrieved card record as the confirmed source of truth for what is shown in the user interface.
• Store request and response references for troubleshooting, audit, and support purposes.