The method to check the validity period of Bank of Communications credit card is as follows:

1. Mobile banking APP: Open and log in to mobile banking to pay. Click on the credit card option. Select View card number. Enter the SMS verification code you received to check the credit card expiration date.

2. Online banking: Log in to the online banking of Bank of Communications. You can also check the expiry date of your credit card.

3. Telephone customer service: Call the customer service number of Bank of Communications. Provide personal information such as name and ID number. Customer service staff will help you check the validity period of your credit card. Bank of Communications Credit Card is a credit card issued by Bank of Communications. Cardholders can consume within the credit limit and then repay. This kind of credit card provides users with complete financial services, including password signature and free choice of payment methods. The longest interest-free repayment period for Bank of Communications credit cards is up to 56 days, and cardholders can also choose to spend overdraft or pay in installments.