If you want to cancel a pending transaction on a debit card, contact the merchant who placed the charge and ask them to reverse it. In many cases, your card issuer can’t do anything to help you until the charge is processed. However, some banks and credit unions do allow you to cancel certain pending deposits and payments online.

Credit card issuers can sometimes cancel unused cards. Canceling a credit can be a good idea to cancel a credit card if you’re not using it for multiple reasons. However, it’s a good idea to keep a few different credit cards active to improve your credit history and credit score.