Art. 1155 Supplemental pleadings

Sometimes new facts or new damages come up after a lawsuit has already started. This rule lets a person add that new information to their case through what's called a "supplemental" petition or answer, instead of having to file a whole new lawsuit.

If both sides agree, the person can simply file this new paperwork with the court's permission. The new claims or defenses have to be related to what was already in the case. For example, if someone's injuries got worse after they filed the lawsuit, they could add those new damages as long as the other side agrees.

If the other side does not agree, the person who wants to add new information has to file a formal motion asking the court for permission. This means going through a hearing where the other side can argue against it. The judge then decides whether to allow the new claims or defenses to be added to the case.