613.7  Written instrument.
  When an action is founded on a written instrument, it may be brought by or against any of the parties thereto by the same name and description as those by which they are designated in such instrument.
[C51, §1692; R60, §2786; C73, §2558; C97, §3473; C24, 27, 31, 35, 39, §10988; C46, 50, 54, 58, 62, 66, 71, 73, 75, 77, 79, 81, §613.7]