Sochaux have lodged a complaint to Fifa over Newcastle's contact with their striker Modibo Maiga.
The French club are accusing the Magpies of speaking to Maiga without their permission and say it is a violation of Article 18 in the international regulations.
In a statement on their website, Sochaux say they twice asked Newcastle to end their talks with the 23 year old, but without success.
Newcastle boss Alan Pardew has been looking for a new striker since Andy Carroll left the club in January.
Maiga even went on strike to force the transfer through, while team-mate Kevin Anin walked out in a protest over his wages.
But their manager Mecha Bazderevic has revealed that he will forgive and forget the players' actions.
He told L'Equipe: "We had a good talk. They told me they were injured and now I could rely on them.
"I told them it is not the right way of acting.
"But anyone can make a mistake and it will be better to have them in the team for the upcoming games."