I got a new FASTag but when i have used for the first its says Blacklisted but i have sufficient balance in my wallet.

Blacklist of tag means vehicle is not allowed to pay through FASTag at the toll plaza. There are various reason of blacklisting of Tag, i.e. Tag is not having sufficient balance in his FASTag account. In such cases Customer should call his bank toll free call center numbers and get the reason of blacklist.

To avoid Blacklisting of tag, customer should recharge his tag when he gets the alert of low balance from his bank.

Also FASTag can be blacklisted by the law enforcement agencies due to any rule violation complaint register against the vehicle. In such cases the enforcement agencies request issuer or acquirer to add the tag id the in the blacklist.