International Supporters Foundation chairman and founder Tim O'Leary has issued High Court proceedings against Mayo GAA seeking the return of a €150,000 donation and damages.
The Bahamas-based market trader confirmed he has initiated legal proceedings against the county board who also threatened the same against O'Leary last week.
The issue stems from a row with the board over governance issues which has been ongoing for several months. In September, the foundation confirmed they were withholding €250,000 raised at a gala dinner in New York. They would not proceed with the funding until "appropriate governance structures" were installed.
O'Leary gave €150,000 in 2018 but is unhappy with the explanations he has received as to how this was spent. In a statement released on social media, he confirmed he would proceed with his action.
"I have given it much thought and deliberation and after speaking to friends/family, yesterday I reluctantly have chosen to press ahead with legal action."