I don't think so. If it is a credit card that can be used, there is a password and signature anyway, which can ensure security. In addition, banks usually send registered letters to users for credit cards that have just been completed and have not yet been opened. From a security point of view, EMS is safer and more reliable than registered mail. As for the accident, it's hard to say. After all, EMS may be lost in transit, but the probability is very small! Peace of mind! !