When this situation became evident, the Sellers were entitled to have the Buyer removed from the case as a party. Rule 17(a) M.R.Civ.P.; Northland Industries, Inc. v. Kennebec Mills Corp., 161 Me. 455, 214 A.2d 100; Borough of Nanty-Glo to Use of Westinghouse Credit Corp. v. Fireman's Fund Insurance Co. (D.C.Pa. 1966) 250 F. Supp. 329; United States for Use and Benefit of Allen Construction Corp. v. Verrier (D.C.Me. 1959) 179 F. Supp. 336 (assignor for security a proper party plaintiff). "Where an assignment is total or where a subrogee has paid the full amount of the loss, the assignee or subrogee is the only real party in interest.
Id.; See also, On-Line Technologies v. Perkin Elmer Corp., 141 F.Supp.2d 246, 254 (D. Conn. 2001); Borough of Nanty-Glo to Use of Westinghouse Credit Corp. v. Fireman's Fund Ins. Co., 250 F.Supp. 329, 330 (D. Pa. 1966) ("An assignor is generally neither a real party in interest nor an indispensable party.")Id.