Art. 463 Cumulation, plural plaintiffs or defendants

This rule explains when several people can join together in one lawsuit, either as the ones suing or the ones being sued. Instead of filing separate cases, multiple plaintiffs or defendants can combine their claims into a single suit if certain conditions are met.

First, the parties need to have some real connection between their claims, called a "community of interest." Second, the court must have the legal authority to handle each claim, and the case must be filed in the right location. Third, all the claims being combined must work together and follow the same court procedures. This means you cannot mix a claim that requires a jury trial with one that does not, or combine cases that follow completely different legal processes.

The rule also allows for a special situation. Normally, claims that contradict each other or cannot both be true at the same time cannot be combined. But this rule makes an exception. A person can still include contradictory claims in the same lawsuit if they present them as alternatives, meaning they are saying "either this happened, or that happened" rather than claiming both at once. There is one exception to this exception, covered under a different rule (Article 3657), which limits when this alternative pleading is allowed.