The founder of the youth-focused pro-Brexit campaign group BeLeave has won his appeal against a £20,000 fine imposed by the elections regulator.
Darren Grimes was punished by the Electoral Commission last year, after being accused of breaching spending rules during the 2016 EU Referendum.
Its political work took place at the headquarters of the offices of Vote Leave - the official Brexit campaign.
Mr Grimes raised cashed online to fund his court appeal against the judgement.
He maintained that he was "completely innocent" of making false declarations in relation to a £675,315 donation from Vote Leave and accused the Electoral Commission of "bias" against Leave supporters.
But the watchdog insisted its investigation had been "thorough and fair" and that it had carried out inquiries into campaigners on both sides of the referendum battle.