If your au PAY prepaid card is registered on an internet shopping site, you need to update the card expiration date. As soon as you receive your new card, please update the expiration date.
For more details, please click here (in japanese only)
If the au PAY prepaid card has already expired and you do not plan to continue using it in the future (you will only use the au PAY app), you do not need to go through the renewal procedure. When you receive your new au PAY prepaid card, please keep it in your possession without going through the procedures to start using it.
If your old card has expired, please cut it with a scissor and discard it.