Operationally, credit card mail can be rejected directly if it is not wanted, just like express delivery. You can call back if you don't sign for it, but sometimes you won't be given a chance to refuse in real life.
You know, credit cards are rarely sent by express, and many are registered letters. Registered letters don't call when they arrive, but usually send text messages. You need to bring your ID card to the outlet, and you can't refuse the visa by phone. If you don't want to use it, you can only send it back yourself. The postage is self-care, which is risky.
After all, no one can guarantee that the credit card will not be lost in the process of sending it back. Once the credit card activation card is stolen, it may make the cardholder bear the loss and may also affect the credit investigation. This is not cost-effective. To this end, it is suggested that the credit card should be mailed or signed first, so as to keep the risk to a minimum and then consider whether it is necessary or not.