Barcelona have denied what the club describes as "serious and unfounded accusations" of corruption after a former vice-president claimed someone "had put their hands in the till".
Emili Rousaud was one of six board members to resign on Thursday night as Barca continue to be embroiled in political crisis under their current president Josep Maria Bartomeu.
All six resigning board members called for the 2021 presidential elections to be brought forward in a joint letter published on Friday by the newspaper La Vanguardia.
In an interview with Spanish radio station Cadena Ser, Rousaud discussed the social media controversy that rocked the club in February, when Barcelona were accused of hiring a company called I3 Ventures to discredit opponents of Bartomeu online, including players like Lionel Messi and Gerard Pique.
"If the auditors tell us the cost of these services is 100,000 euros and we have paid one million, it means someone has put their hand in the till. I have no evidence and I cannot say who," Rousaud told the programme RAC1 on Friday.
Barcelona responded with an official statement that read: "In the light of the serious and unfounded accusations made this morning by Emili Rousaud, ex-vice president of the club, in different interviews with the media, FC Barcelona categorically denies any activity that can be described as corruption and therefore reserves the right to any legal action that may correspond."