Sochaux have confirmed they have asked FIFA to intervene and prevent Newcastle contacting their striker Modibo Maiga without their permission.
Maiga, 23, has failed to turn up for training as he looks to push through a £7 million move but his club have reacted angrily to his attempts to get a transfer.
Sochaux chairman Alexandre Lacombe said on Monday: ''Newcastle are going on contacting our players despite our refusal. So we will register a complaint with UEFA, telling them such behaviour is not fair play.''
And a statement appeared on their official website a day later, saying: ''On Monday August 22, 2011, FC Sochaux-Montbeliard sent a referral to FIFA with the aim of obtaining (assurances) on the part of Newcastle United that they will stop their contacts with Modibo Maiga, who is under contract with FCSM until 2014.
''This (contact) is in violation of Article 18 of the current international regulations. This measure comes after Sochaux demanded without success, in an official manner and on two occasions, that the English club put a stop to their actions.''