First of all, credit cards contain a lot of sensitive information, such as credit card number, password, avatar and so on. If the postman or post office employee discloses this information unintentionally or intentionally, the user's personal data may be stolen or used by fraudsters.
Second, the courier company has a wide distribution range, even if the distribution location is in a small local village or sparsely populated place, it will arrive. Moreover, many new users will be used by fraudsters, and even if they don't receive express parcels in person, they may lead to the risk of losing their identity information.
Finally, even if the express parcel is highly confidential during transmission, the postman or other employees who may come into contact with the express parcel may be used. For example, changing the mailing address or stealing credit cards or other valuables in credit card bags during mailing. Therefore, in order to protect consumers from these risks, banks usually choose to handle business in branches or deliver credit cards to designated places for users to collect themselves.