Check the FASTag sticker on your vehicle’s windshield
Look for the FASTag ID printed on the tag label
Open your FASTag issuer’s mobile app or website
Log in using your registered mobile number or vehicle number
Go to the FASTag account details or tag information section
Check your SMS or email from the FASTag provider
Contact your FASTag issuer’s customer care
Provide your vehicle number and registered mobile number to get the FASTag ID
Check the wallet or bank account linked to your FASTag
Visit the bank branch or toll plaza helpdesk if needed