The litigants of one party involving many people in a joinder may name a representative to handle the litigation. 當事人一方人數眾多的共同訴訟，可以由當事人推選代表人進行訴訟。
Joinder means consolidating more than two persons into one lawsuit for the purpose of solving the disputes and therefore is also called consolidation of parties. 共同訴訟是指將兩個以上的當事人合并到一個訴訟中進行審理，因而又可以稱為當事人的合并。