Most Separation Agreements, especially those that were mediated agreements, provide that before anyone goes to Court to try to change the terms of the Separation Agreement that they attend at least one session of mediation. If you previsouly mediated your agreement, you could meet with that mediator, if you both agree. However, you can choose any mediator you like. Of course, if you didn’t mediate your original agreement, you and the other party just need to agree upon a mediator.