| Name | Description | Type | Constraint | MaxLength |
|---|---|---|---|---|
| UserId | This is the user identifier allocated by the merchants system to verify a staff user | xs:string | Mandatory | 50 |
| SerialNumber | This is the serial number of the PIN Entry Device. The serial number and/or PTid can be used to verify the PIN Entry Device is part of the estate | xs:string | Mandatory | 12 |
| PTid | This is the PTid of the PIN Entry Device. The serial number and/or PTid can be used to verify the PIN Entry Device is part of the estate | xs:string | Mandatory | 8 |
| SessionId | This is the session Id (GUID) that is associated to a single Pay at Table transaction, the session Id is generated and managed by the merchant system | xs:string | Mandatory | 36 |