But you must remember the first name of your last name.

I don't need it in the future, just use the cancellation card. If you can't remember, you can't successfully return the card.

So it's best to write a real name.

Because the credit card is sent by ordinary mail, it may not be sent to the cardholder. If they are lost, even if you know your home address and phone number, you generally won't know your mother's name, so you won't activate the card.