Can I use your test credit cards numbers to store a card under Billing Info?

Yes, we recommend using the test credit card number "4000-0000-0000-0341" in order to specifically test adding a credit card number to the Billing Info section of an account.

While a 'Declined by Gateway' error will be thrown, Recurly will allow you to store card regardless.

Please make sure you are still in sandbox mode when testing this, as it will not work while you're in Development or Production mode.