Art. 646 Amendment of petition to join a party

If you file a lawsuit but leave out someone who legally needs to be part of the case, the court doesn't have to throw your case out. Instead, the judge can let you fix the problem by adding that missing person to the lawsuit. If the case had already been fully presented to the court, the judge can reopen it so new evidence can be heard about the added party.

This can also happen if the case is already on appeal. If an appeals court notices that someone was left out of the lawsuit, or if a party points this out, the appeals court can send the case back to the trial court. This gives everyone a chance to add the missing party and present any additional evidence needed.

The main point of this rule is to give people a chance to correct a mistake instead of losing their case completely just because someone who should have been included was left out.