# Billing


## Fields

| Field                                                                     | Type                                                                      | Required                                                                  | Description                                                               |
| ------------------------------------------------------------------------- | ------------------------------------------------------------------------- | ------------------------------------------------------------------------- | ------------------------------------------------------------------------- |
| `internalPaymentMethod`                                                   | [InternalPaymentMethod](../../models/operations/InternalPaymentMethod.md) | :heavy_check_mark:                                                        | N/A                                                                       |
| `paymentMethodId`                                                         | *Optional\<Long>*                                                         | :heavy_check_mark:                                                        | N/A                                                                       |