1. The credit card has expired. If your credit card is not used for a long time, after the expiration date, this card will be useless, and you must change it for a new one to activate it.

2. Do not meet the conditions for online activation. Some bank credit cards stipulate that online application for new cards must be activated at bank outlets, not online.

3. Verify the authenticity of the credit card. If you apply for a credit card through a street salesperson or an informal channel, you must first verify the authenticity of the card. Generally, you can call to confirm that the information is invalid and prove that the card may be fake.

4. Information verification does not meet the requirements. If the basic information provided when applying for a credit card changes, it will naturally be inconsistent with the previous information when activated. The information before and after the proposal is inconsistent. Call the bank to explain the situation.