More than 1,600 Texas Tag holders can expect a credit to their accounts following a cyberattack.
The Austin American-Statesman reports that customer accounts are secure and a total of $46,000 will be credited.
Authorities with the Texas Department of Transportation are trying to identify hackers who from April 6 through April 8 slowed the tag system.
Error messages misled customers who were trying to put more money into their tag accounts, causing them to do several transactions instead of just one. Some accounts ended up being charged more than the necessary amount.
TxDOT spokeswoman Karen Amacker said Thursday that no action is necessary by customers to get the account credit. She says electronic refunds should be completed in a few days.
The initial version of this story by the Associated Press incorrectly said Toll Tag users were affected. The NTTA told NBC 5 that NTTA Toll Tags were not compromised in the TxDOT attack.