It is reported that the Donegal County Board could face a €60,000 bill after being ordered by the GAA's management committee to offer a refund of a €5 levy imposed on tickets for this year's All-Ireland football final.
Croke Park took issue with the levy which increased the stand ticket price to €85.
The Irish Independent reports that GAA management had earlier sought an explanation of the background to the levy, but were dissatisfied with the written response, leading to the chairman and secretary being summoned to HQ.
According to management committee minutes seen by the newspaper, "the officers apologised for the inaccurate letter originally submitted and explained the circumstances surrounding the distribution of All-Ireland tickets."
They acknowledged that the €5 was a levy and gave assurances that there would be no repeat in future.
Mayo were also asked by Croke Park to explain their All-Ireland deal, which offered clubs 20 extra tickets at an additional cost of €1,000.
They successfully argued that this was in addition to clubs' ordinary allocations and that it was not compulsory to avail of the deal.
It's expected that new guidelines will be issued to counties ahead of next year's All-Ireland finals, detailing the limited circumstances in which ticket prices can be increased.