I'm having an issue with my postal code on a payment page.
If you are having issues with your postal code when trying to make a payment, please read on.
Before you do the payment form, edit your profile to make sure the address in the system for you is your billing address for your credit card.
On the payment page, at the right end of the box where you enter your credit card number there is a slot where you must enter your postal code. Make sure that matches what is in the system and that it matches your billing address.