Rule 20: Permissive Joinder of Parties
*may join
*common transaction
*common question of law or fact
Rule 12: Compulsory Joinder of Parties
certain parties must be joined if they are necessary for the just adjudication
*court has discretion to proceed or not
necessary party
Rule 14: Impleader
*defendant can implead a third party if they may be responsible for part of their liability
*must be derivative liability
Permissive Counter
*may be raised
*not out of same transaction
*must have its own jurisdiction
Compulsory Counter
Cross-Claim
*same side of the “v.”
*may assert
*same transaction