To check the status of a Capital One credit card application, call the company's credit card customer service line. Many applicants get a response within 60 seconds for their online or over-the-phone applications, explains CapitalOne.com. Other applicants receive Capital One's written decision in the mail within seven to 10 days.
Capital One sometimes needs to collect additional information to make a decision about providing a credit line, according to its website. Once approved, applicants usually receive their new credit cards and information by mail within seven to 10 days. Other Capital One financial products, such as mortgages and automobile loans, have different customer service numbers for checking application status.