Inverness Caledonian Thistle are "incredulous and furious" at the decision not to overturn the red card that will rule James Keatings out of the Scottish Challenge Cup final.
The 28-year-old was shown a second yellow for simulation during the Championship side's 2-1 semi-final win over Rangers Colts on Sunday.
Inverness submitted video evidence which they believe showed he had been caught by Ciaran Dickson, but a three-man Scottish FA panel chose to uphold referee Greg Aitken's decision.
"If the individuals involved in the tribunal can watch the footage and call this simulation, there can be no other conclusion other than they do not understand football," read a club statement.
"Fans and officials of all clubs are mystified by this. It has cost our player the chance to play in a cup final and it also damages the credibility of our governing body and brings the game into disrepute.
"The decision is plainly wrong and the dogs in the street know this. We have no right to appeal this final decision and it is painful to accept. There is clearly something wrong with the system."
The Highland club say they have chosen to speak out on behalf of Keatings and "the growing number of Scottish clubs who believe the SFA disciplinary process is not fit for purpose".
Keatings, who had cancelled out Dapo Awokoya-Mebude's opener before being sent off for the first time in his career, will miss the final against Raith Rovers on Saturday, March 28.
Miles Storey scored the winner 15 minutes later to send Inverness, who have won the trophy twice, to their fifth final.
How does the process work?
If SPFL clubs decide to appeal against a decision, they must prove that an obvious error has been made.
They have until 13:00 on the first working day after the match to lodge their intention to appeal, and their case must be submitted by 17:00 the next day.
The player or any other personnel cannot attend the hearings, which will be a video conference between a tribunal of trained, independent judicial panel members.
The Scottish FA's compliance officer plays no part in the proceedings.