1. The first reason is that the limit is exceeded.

Usually, when a credit card is activated, there is a single transaction limit in a single day. If the transaction exceeds this limit, it will show that the transaction is limited.

2. The second reason is the risk.

Under normal circumstances, banks will supervise the use of credit cards. If a large number of credit cards suddenly appear in different places, they may be regarded as risky transactions and may be stolen, so transactions will be restricted.

3. The third reason is that there is suspicion of cashing out.

If the user has a series of large integer credit card transactions, and they all swipe their cards in the same place, the bank will think that the user is suspected of cashing out and will restrict the user from using the credit card.