New Delhi: National Highways Authority of India (NHAI) on Wednesday directed all banks issuing FASTags to undertake “immediate” validation of vehicle registration numbers (VRNs) linked to the smart tags issued by them. The banks have been directed to blacklist FASTags that are found linked to incorrect or invalid VRNs.The decision follows some complaints that VRN captured by FASTag readers did not match with the registration number displayed on the vehicle’s number plate. “Such discrepancies have the potential to undermine enforcement mechanisms and may lead to evasion of govt revenue and also attract penal provisions under Motor Vehicles Act,” the highways authority said.It said that a considerable number of such mismatches are associated with FASTags that were issued prior to the integration of tags with Vahan database.