Villarreal has reported Malaga to Spain's National Professional Football League (LFP) on the grounds of an outstanding payment for midfielder Santi Cazorla, according to Marca.
The Spanish sports paper reports that the Madrigal outfit sent an official complaint to the body as they feel they are still owed 2 million euros plus VAT from the 27-year-old's big money summer transfer to La Rosaleda in the summer.
Cazorla was arguably Malaga's biggest signing following the Sheikh Abdullah Al Thani's purchase of the club last year, in a 21 million euro deal, but it is believed the presence of vice president Sheikh Abdullah Ghubn will help thrash out a compromise.
Meanwhile, the case is now in the hands of an arbitration commission within the LFP to analyse the documentation, as the publication also claims that a court case is a last resort.
Malaga currently sits 6th in La Liga, and faces Valencia on Sunday.