The Department of Social Protection has launched investigations into 3,300 cases of suspected welfare fraud this year.
41 cases have been referred to the Chief State Solicitors Office.
A further 45 people have also been convicted in court - with two jailed.
Most cases relate to Jobseeker's Allowance, but Sinn Féin's social-protection spokesman, Wicklow T.D. John Brady, says welfare fraud is actually dropping