It would be very hard for them to convince the judge to vacate the judgment. But they could try. In general, they would have to show a mutual mistake in order to re-form the contract. Judges, however, do have considerable discretion in this area. If you have any documentation about the real, original, settlement, your case is stronger if they should try to have the judgment modified or vacated.
Answered on Aug 19th, 2015 at 12:58 PM