Abstract: Various embodiments are described herein for methods, devices and systems that can be used to authenticate a user identity attribute associated with a user during a transaction with a merchant. In one example embodiment, the method comprises receiving, at a payment processor, a unique identifier corresponding to a payment instrument provided by the user at a merchant terminal where the payment instrument is pre-linked to one or more user identity attributes, transmitting the unique identifier to an issuer network for payment verification, generating a transaction approval indicator and transmitting the unique identifier and an identity verification request from the payment processor to the third party server if payment verification is successful, receiving the one or more user identity attributes associated with the unique identifier from a third party server, and subsequently transmitting the one or more user identity attributes and the transaction approval indicator to the merchant terminal.