We use PayPal and Braintree to process our credit card payments.
While just about any number will do, if you're having troubles you can refer to the list below or the PayPal documents.
| Card Type | Number |
|---|---|
| Mastercard | 2221000000000009 |
| Mastercard | 2223000048400011 |
| Mastercard | 2223016768739313 |
| Mastercard | 5555555555554444 |
| Mastercard | 5105105105105100 |
| Visa | 4111111111111111 |
| Visa | 4012888888881881 |
| Visa | 4222222222222 |