Real Madrid would understand and approve the move if La Liga decide to help Barcelona when registering Messi.
They know that the revenue the player brings to the league is necessary.
Two weeks ago, La Liga president Javier Tebas says it would be "impossible" for Barcelona to offer Lionel Messi the same salary he was on last season as they look to commit him to a new contract.
The Argentina star's contract at the Catalan side expired at the end of June, but they have not given up on giving him a two-year deal.