
Depends where you live too the senior manager in our area has decided to centralize all investigations 50 miles+ away from our office(one reason I am glad I'm no longer involved in want is now known as CFIS-Counter Fraud)I had a "regional"person investigating a customer(current terminology for people who claim benefits)want to sit in on one of my benefit interviews so they could ID the person later IF it was the person they had seen working. As my interviewing can include very personal questions about the person's sex life I advised my customer to decline(which they have the right to do)the fraud officer being a man & the girl concerned being a rape/incest victim aged 16 who had given birth a couple of weeks earlier & had alleged been working in a pub the day she had her baby !!!! Turned out the investigator had been watching the wrong person(not on benefit)in the wrong street in the wrong town !!!!!there wasn't even a pub by the same name with 25 miles !!!
However if they are defrauding the DWP(Dept for Work & Pensions hasn't been the DSS since 31st March 2002)they will probably be defrauding the local council through Housing & Council tax benefits & they are dealt with locally & only need the address & are on the whole very keen, I know a lot of my now ex colleagues have gone across to the Local Authority & they are investigating more cases a lot quicker than our DWP lot do(tell me about them I have referred a lot through information received from employers I built up relationships with when I worked in the old fraud section & they have done nothing due to over load !!!!!!)
Employers cannot dismiss anyone if they believe they are defrauding benefits especially if they find out after two years unless the employees are breaking their contracts(i also have a friend who sits on the Industrial Tribunals)
I would suggest an anonymous phone call to your local council housing/council tax benefits people would be your best option as they share information once they have established that an offence has been committed