Intervention is a procedure that allows a person or organization not directly involved in a legal matter to join in the proceedings. That person/organization would be called an intervener (also spelled intervenor). Intervention may occur when a decision in a particular case may affect the rights of parties outside the case, and therefore those parties should have the right to be heard. For example, if the proposed intervener represents a group of people who have a direct concern in the issues raised in the case or complaint, or would be affected by any decision rendered by a court, tribunal or board, then seeking intervener status might be in order.