The Paytm FASTag is a simple & reusable tag that works on the radio-frequency identification technology (RFID). It needs to be affixed on the vehicle’s windscreen. Each tag is linked to a registered Paytm Payments Bank account to facilitate instant automatic deduction of toll charges. This program is part of the National Electronic Toll Collection (NETC) initiative, rolled out by NPCI under the guidelines of NHAI & IHMCL.