(a) Grounds.
(1) By a Plaintiff. Persons with claims that may expose a plaintiff to double or multiple liability may be joined as defendants and required to interplead. Joinder for interpleader is proper even though:
(A) the claims of the several claimants, or the titles on which their claims depend, lack a common origin or are adverse and independent rather than identical; or(B) the plaintiff denies liability in whole or in part to any or all of the claimants.(2) By a Defendant. A defendant exposed to similar liability may seek interpleader through a crossclaim or counterclaim.(b) Relation to Other Rules. This rule supplements-and does not limit-the joinder of parties allowed by Rule 20.
