The following guide will help you migrate from old versions to API V4. We advise you to do so, as old versions won't be maintained anymore.
| Guide | Link |
| Token migration | Go to Token migration guide |
| Create and authorize a payment migration | Go to Authorize migration guide |
| Capture a payment migration | Go to Capture migration guide |
| Instant Payment Notification migration | Go to IPN migration guide |
| Refund/Reverse a payment migration | Go to IRN migration guide |
| Status of a payment migration | Go to IOS migration guide |
| Card Info migration | Go to CardInfo migration guide |