Barcelona's president, Joan Laporta, has stated that the club may seek a complete review of Sunday's 3-2 La Liga defeat to Real Madrid.
This action would be taken if Lamine Yamal's 28th-minute disallowed goal, which was overturned by VAR, is ultimately deemed a legitimate goal.
Laporta announced on Monday that Barcelona would request all available footage and audio of the incident from the Spanish Football Federation.
The match was paused for several minutes as the VAR tried to determine whether Yamal's effort had crossed the goal line, but it could not find a clear camera angle, and the decision not to award a goal stood.
"If the club understands that an error was made in the revision of the incident, we will take all available measures to reverse the situation without discounting, obviously, any necessary legal action," Laporta said.
"If it is confirmed that it was a legal goal, we will move ahead, and we do not discount requesting that the game be replayed, just as has happened in another game in Europe due to a VAR error."
A Belgian Pro League match between Anderlecht and Genk, originally played in December, was scheduled to be replayed in full due to a VAR error after the Disciplinary Council for Professional Football ruled in favor of a Genk appeal.
Laporta said he was dissatisfied with the "improper use" of VAR, adding that the tool was creating "confusions with contradictory criteria according to matches and teams."
"We understand the difficulty faced by officials, but it's for that reason that such tools exist (like VAR), which should help the competition be fairer and not the other way around," he said.
Barcelona, with 70 points after 32 matches, trail leaders Real by 11 points.
