Wigan Athletic fined £40,000 for breaching the Football Association's Football Agents Regulations during the signing of Marc-Antoine Fortuné.
The 32-year old French striker joined the Latics in the summer - after leaving West Bromwich Albion - and has gone on to score five goals in 48 appearances, as Wigan occupy fifth in the Championship, as well as reaching an FA Cup semi-final.
The charge was related to the players' agent Willie McKay, and the actions carried out in the process of the signing of Fortuné.
A statement on the FA website read: "Wigan Athletic have been fined £40,000, subject to any appeal, after breaching The FA's Football Agents Regulation C10 (a) (i). The charge, which the club admitted, relates to agency activity carried out by Willie McKay for Wigan in relation to the signing of Marc-Antoine Fortuné."
It was also confirmed that McKay has had his overseas agent registration suspended for nine months, whilst staying the suspension for two years.
A statement from Wigan officials was released on the official site: "Further to today's FA statement in relation to a technical breach by the club of The FA's Football Agents Regulation C10(a)(i), Wigan Athletic are aware of the decision and are awaiting the full findings of the Independent Regulatory Commission to enable us to review our position in respect of the decision."
No restrictions have been placed on the player, and Fortuné is expected to feature in the play-offs, as Wigan look for an instant return to the Premier League.