(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. Adopted effective March 1, 2017