1. If the credit is good, the bank will send the new card to the billing address by registered mail before the card expires, without any formalities.
Usually a new card will be sent to you at the end of one month before the credit card expires, and it is a registered letter. Generally, the sending time of registered letters is within 15 days.
The old card can be used until the end of the month. You can't use the new card until you receive it. With the opening of the new card, the old card cannot be used immediately. Just cut the magnetic stripe and destroy it yourself. When the old card expires, you can use the points of the old card by updating it.