Yes, the credit card is a registered letter. First of all, I won't lose it. It's okay for someone else to sign it. If the postman is in charge, he will only leave the bill of lading instead of giving the card directly to your colleague. Generally, it is required to pick up the goods within 15 days after receiving the bill of lading by registered mail. You can calculate the time. If it is too late, you can call them according to the post office phone number on the bill of lading, stating that someone will pick it up later and ask them not to return the letter. Credit card opening requires some personal information, so it is basically safe.