Use this method to check whether a coupon code was used by the original recipient (e.g., for non-transferable coupons).
**Type**: String
**Parameters**
| Name | Type | Value |
| sessionId | String | ID of the current session |
| blockId | long | ID of the coupon block |
| code | String | Coupon code to be queried |
**Return values**
Recipient ID of the assigned code (in most cases, this is the recipient's email address)
**Code structure**