Is there a fake credit card number that can be used to test a credit card donation?
If the Merchant Account is in live mode, we recommend using a credit card number of your own to test the transaction. The payment can either be refunded by someone at your organization, or you can contact the credit card processor to ask them not to process it. You can also contact your credit card processor to inquire if they have any recommended procedures for testing credit card transactions [Contact PayPal] [Contact IATS].
If the Merchant Account is still set to demo mode, the following fake credit card information can be used: