Hi @bphung. From your transactions list (online, in your POS, etc) you can search your transaction history using the last 4 digits of any credit card. Whether or not that card is expired is not relevant to the search. It would only be a problem if you decided to do a refund to an expired card, which wouldn’t be allowed by Visa/Mastercard, etc.
Let me know if you have any further questions.
Chip A.
Square Expert & Innovator and member of the Square Champions group. (But NOT a Square employee, just a seller like you)
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