65-year-old Terrence Hutchings claimed more than £50,000 in state benefits over five years even though he was working as a bingo caller in the Rhondda.
He was reported to the authorities by an anonymous tip off.
Prosecutor Alexander Greenwood said "He was evasive and vague about his situation. In interview Hutchings said that he believed he could work 16 hours a week before having to declare that he was working. But it was a mistaken belief because he should have declared any hours he was working."
Mr Hutchings was given an eight month suspended sentence and ordered to complete 120 hours unpaid work by a judge a Merthyr Tydfil Crown Court.
His defence barrister said he was "utterly crestfallen. He never lived the high life. This is not a champagne swilling individual living on state benefits."
More top news
Staying mostly dry overnight with generally light winds, but cloud and wind will gradually increase from the northwest from the early hours.
In the last programme we've been to meet two Welsh entrepreneurs who chose a different route and we visit the Energy Centre at Coleg Menai.
ITV news presenter Jonathan Hill reflects on this week's Wales at Six special series on Welsh education.