Contact IDFC FASTag Customer Care Number 1800 266 9970 or email to [email protected] for queries regarding FASTag , Toll plaza complaints, etc. You can buy a new FASTag by contacting the IDFC Bank FASTag customer care number given below. Contact number: 1800 266 9970 For a new registration or queries, you can write to IDFC FIRST Bank at [email protected]. With IDFC FIRST Bank FASTag – FIRSTForward, make three payments like toll, fuel and parking instantly in a quick, queue-free and contactless manner. Apply for FIRSTForward FASTag now! Each TAG is supported by timely and detailed MIS Validity of 5 years How to disable a FASTag account in the event that that the car is stolen or FASTag is damaged? In the case you lose or damage your IDFC Bank FASTag RFID tag, you should get in touch with the customer care of the bank directly through their customer care number.