676.2  For money only — contingent liability.
  The judgment can be only for money due or to become due, or to secure a person against contingent liabilities on behalf of the defendant, and must be for a specified sum.
[C51, §1838; R60, §3398; C73, §2895; C97, §3814; C24, 27, 31, 35, 39, §12669; C46, 50, 54, 58, 62, 66, 71, 73, 75, 77, 79, 81, §676.2]