Swansea City manager Kenny Jackett accused Bradford striker Dean Windass of conning the referee to win a late penalty in Saturday's 2-2 draw.
Windass converted the penalty after he had fallen to the ground following an off-the-ball challenge with Kris O'Leary, who was then sent off.
"There was a bit jostling and then Windass threw himself to the floor," Jackett told BBC Wales Sport.
"He took a gamble and it worked for him but it was a unbelievable decision."
Jackett, who also felt his side were wrongly denied a goal by an offside decision against Rory Fallon, said the club will appeal against O'Leary's sending off.
It was a harsh decision and it's cost us two points
Swansea City manager Kenny Jackett
O'Leary had brought Swansea level against Bradford after Windass' 23rd-minute equaliser.
The midfielder went on loan to Cheltenham last month after injuries had limited his Swansea opportunities, but looked impressive in his second successive start.
He faces a three-match ban unless Swansea's appeal is successful.
"I really feel for him," added Jackett. "He's come back into the side the last two weeks after a stop-start season.
"He scored the first goal for us and looked very strong.
"He said he was marking Windass tight, but then Dean grabbed him and went down to the floor. Kris didn't strike him.
"It was a harsh decision and it's cost us two points."
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