Reports in France state that Toulon owner Mourad Boudjellal will write to the LNR requesting to retire Jonny Wilkinson's number 10 shirt.
Wilkinson joined the club in 2009 and has become a hugely influential figure for the European champions.
The former England fly-half has announced that he will retire at the end of the season after a glittering career, after the Heineken Cup and Top 14 Finals.
Boudjellal will allegedly write to the Ligue Nationale de Rugby asking to retire the 10 jersey, according to RMC Sport.
It had not been made clear so far which number Toulon would use on the back of the fly-half's shirt instead, while there is also significant doubt regarding whether the request will be accepted.
Another option could be to use a letter instead of a number, just as Leicester Tigers have done in the past. In that system, 'J' represent the fly-half.