Reply To: 12-digit number on back of oyster card Home › Forums › Using Oyster › 12-digit number on back of oyster card › Reply To: 12-digit number on back of oyster card 28/04/2023 at 00:19 #4883 Mike (admin)Keymaster Yes, you should keep the Oyster card number to yourself. It won’t be printed on receipts as far as I know, and certainly not in full.
