Gerry Horkan (Fianna Fail) | Oireachtas source

Regarding investigating fraud, if someone becomes aware of fraud, what mechanism exists for that person to report that information? I am referring to the case of someone having an insurance claim for a trip or a slip in a nightclub while at the same time it is the talk of the town that the same person is going on holidays and bungee jumping. Insurance companies use private investigators in some cases like that. What can an ordinary member of the public do in the case of a known insurance fraud? I accept that quite often no one will know about insurance fraud.