The investigation focused on activity in 15 counties, mainly in the midlands and the east.
Two men have been charged as part of an investigation into a gang impersonating gardai.
Gardai have been investigating claims people were pretending to be officers and taking cash from people's homes.
It focused on 15 counties over the past ten months, particularly the East and the Midlands.
The men, aged in their 50s and 30s, are due to appear before Kilkenny District Court this morning at 10.30am.
The other three people arrested, two men in their 30s and 60s and a woman in her 50s, have been released without charge and files are being prepared for the DPP.
Read More: Five People Suspected Of Impersonating Gardaí Still Being Questioned
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