A MECHANISM FOR AUTHORISING TRANSACTIONS CONDUCTED AT UNATTENDED TERMINALS

Methods and systems for processing transactions initiated at unattended terminals using user devices without visible credentials, and providing services concerning such transactions, are disclosed. A first party issues a set of pseudo credentials for a user device responsive to authorisation request data concerning a transaction initiated with a second party using the user device and provides the pseudo credentials to the second party, who maps such pseudo credentials to real credentials of the user device acquired from the user device during the transaction. The pseudo credentials are also provided to a user of the user device who submits such pseudo credentials to the second party during a subsequent enquiry concerning the transaction. To authenticate the user device, the second party requests authorisation from the first party using the pseudo credentials.