According to reports in Norway, Oslo police have decided to prosecute former Lyn director Morgan Anderson for forging Mikel's contract in April 2005.
It is claimed that Mikel never personally signed a professional contract with Lyn after he turned 18, meaning the club had no right to sell a player they did not own.
Reports suggest that if Anderson is convicted Lyn could have to pay Chelsea the £16million they took for him last summer, but chairman Sveinung Lunde does not think it will go that far.
"I have no reason to believe that," he told the Norwegian press.
"As I understand it, it is a matter between Morgan Anderson and the police." Anderson's lawyer, meanwhile, has said that his client was not the man responsible. "We have seen an explanation which is very strange," Cato Schiotz told Dagbladet. "It might seem like someone has forged the contract."