In third-party impleader, who must the Third-Party Answer be served on?

• A. The defendant, plaintiff, and all other parties
• B. Only the defendant
• C. Only the plaintiff
• D. The court

Answer: (A)

In third-party impleader, the Third-Party Answer must be served on everyone who has a stake in the case and must receive pleadings. Specifically, the third-party defendant answers the third-party complaint and serves that answer on the party who filed the impleader (the third-party plaintiff) as well as on the original plaintiff and on all other parties to the action who are required to be served with pleadings. This ensures that all participants are properly notified and have a chance to respond, keeping the process fair and allowing the case to proceed with full participation. Service should follow the normal rules for serving pleadings, so the court and all relevant parties are kept in the loop.