Chris Bryan, 33 has won an appeal against his conviction for assaulting a grandfather at a benefits assessment.
Keith Langham, 63, was left with blood pouring from a head wound. Mr Langham was the official appointee to help disabled wife Karen, 63, with the interview for her Personal Independence Payments.
That conviction was overturned by Her Honour Judge Julie Clemitson following a two-day hearing at Newcastle Crown Court last week.
Mr Bryan, of Birtley, Gateshead, who also works as a personal trainer, said after the case:
"I pleaded my innocence from day one. I felt it was the wrong decision the first time. "I did 150 hours community service and paid my fine.
"It was not just about getting the conviction overturned, it was to clear my name." It affected my personal training business and did effect me getting work in security as it was flagged up on checks."