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The following parameters are critical:
| Parameter | Description |
| Password | User password to access the web service or interface |
| Cardnumber | Card number |
| Cardholder | Сard owner |
| Expiremonth | Card expiration month |
| Expireyear | Card expiration year |
| Cvc2 | CVC2 code |
| Signature | Order signature |
| PaymentToken | Provider payment token or Assist token (type 5) |
