The Probation Service says there is no evidence to show that disclosing details of sex offenders reduces reoffending.
A new Government bill which will allow gardaí to give names and address of sex offenders to the public is being cautiously welcomed.
The proposals will also allow for the electronic tagging of an offender as part of a sex offender order.
Probation Service Director Vivian Geiran says there is a concern that the open disclosure will cause offenders to go off the radar.
"There's no evidence to show that public information would help in that way," he said.