In civil litigations, the proper words are "pleading" and "complaint." See following definitions in Black's Law Dictionary:

Pleadings: The formal allegation by the parties to a lawsuit of their respective claims and defenses...

Complaint: The original or initial pleading by which an action is commenced under codes or Rules of Civil Procedure.

Indictment: A formal written accusation originating with a prosecutor and issued by a grand jury against a party charged with a crime.

Therefore, the word "indictment" can only be used to denote a 起訴狀 in a criminal case, rather than in civil actions.