| Property | Type | Description | Required or Optional | Available Version |
|---|---|---|---|---|
| buyer | String | ID of the buyer account or email address for a guest user. | Required | 60.0 |
| couponCodes | List<String> | List of coupon codes. | Required | 58.0 |
| effectiveAccountId | String | ID of the account. | Required | 58.0–59.0 |
| transactionId | String | ID of the transaction, which must be a valid cart ID. | Required | 58.0 |