Check the FASTag sticker on your vehicle’s windshield
Look for the unique FASTag ID printed on the tag or sticker
Open your FASTag issuer’s mobile app or website
Log in with your registered mobile number or vehicle details
Go to the FASTag account or tag details section
Find the FASTag ID listed in the profile or tag information
Check your SMS or email for the FASTag activation message
Contact your FASTag issuer’s customer care with your vehicle number
Visit the bank or service provider that issued the FASTag
Use the tag number shown in the issuer’s statement or account dashboard