There are many reasons why the credit card payment shows that this number is invalid:

1. It is possible that the magnetic stripe of the credit card is broken.

2. Your credit card has been frozen.

3. Your card is newly applied for and the card has not been activated.

4. The most fearful thing is being deceived by others and applying for a fake card on your behalf.

Of course the most direct way is to call the 24-hour bank free consultation hotline!