According to the official website, Card Services, P.O. Box 60501, City of Industry, CA 91716-0501 is the postal location for Capital One payments. Card Services Inc., ATTN: Exception Dept, 2012 Corporate Lane, Suite 108, Naperville, IL 60563 is the overnight address.
The website advises Capital One cardholders to verify their credit card statements for the correct mailing address. They can also choose the one-time payment option, which, if used before 8 p.m. Eastern Time, enables payment to be credited the same day as it is made.
Another option for making payments is AutoPay, which only needs to be set up once and automatically arranges payments one day beforehand. There are no additional fees for either the one-time payment or AutoPay choices.