An Aadhaar card holder can track the delivery status of their Address Validation Letter through the official UIDAI portal itself. All an individual will need to do is log onto the official UIDAI portal, select ‘My Aadhaar’ and then select the ‘Check Aadhaar Update Status’. Finally, the individual must enter the service request number (SRN) that they were given at the time of making the address update request.