ShippingEasy processes all One Balance purchases through Stamps.com. It is easy to update your One Balance account to add a new credit card or change your billing address.
Click Payment Method under your One Balance account. This will take you to your Stamps.com account's Payment Methods page.
Choose to Add a new CC, Edit the existing CC, or Delete an entry.
Go to Payment Settings to select the designated card from the dropdowns. Click SAVE.
You are done! ShippingEasy One Balance will now use your updated information when billing you for label purchases.