It means that when bank K cancels the account, it prompts that there is a contract. It may be that the user and the bank have handled other businesses, or that bank K has tied up other online businesses.

When the bank card is cancelled, if there is a contract, it may be that the user and the bank have handled other businesses, or the bank card is bound to other online businesses. The user must cancel the contract first to ensure that there is no business in the card at present before canceling the account. Banks can help users find out what kind of contracts exist, but only those related to banks.