1. security risk: the courier company may not guarantee the security of your credit card, and there are risks such as loss, theft and loss. This may cause your credit card information to be used by criminals for fraud or malicious consumption.

2. Failure to deal with the problem in time: If your credit card is abnormal or needs to be dealt with in time, the problem may not be solved in time because you did not sign for it directly, resulting in greater losses and troubles.

2. Impact of credit record: If your credit card bill is not repaid in time, it will have an impact on your credit record, thus affecting your personal credit rating and credit lending.