Moves are being made to ally fears following an alleged Property Tax security breach.
It comes after the company which operates the helpline for the Revenue Commissioners discovered a worker had unnecessarily taken credit card details from a small number of callers.
The employee has been suspended while investigations by the Gardaí and Revenue continue.
Eleven members of the public were affected by the alleged fraud attempt but no one has suffered any losses.
Data Protection Commissioner Billy Hawkes doesn't think people need to worry about the incident.
He said: "Our understanding is that the incident is quite limited, that it was discovered quite quickly and that action was taken immediately, including notfification of the Gardaí."