How to Update Credit Card Details
To start, go to www.srfax.com and Sign In. (You will find this on the top right-hand corner of the screen marked as "SIGN IN.”)
Once in the account, you go to “My Account” and “Billing Details” found under the logo, on the left side of the account.
Once on this page, you enter the credit card information, such as name, number, billing address, etc.
Once filled out, press “Next” to save the changes made at the bottom of the page.
Once updated this new card will be used for any future transactions on your account, such as auto pay.