Former Lyn Oslo director Morgan Andersen has been found guilty of forging contracts relating to John Obi Mikel in 2005.
Andersen, who has told the court he plans to lodge an appeal, was handed a one-year suspended jail sentence for the offence.
Nigeria international Mikel, who left Lyn to join Chelsea in the summer of 2006 after a protracted transfer saga also involving Manchester United, initially joined the Norwegian club as an amateur as he was under 18.
After the midfielder's 18th birthday, the Norwegian FA were presented with a professional contract which Mikel has denied signing.
Mikel documents forged 
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