Such confession 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. History: Laws 1889, ch. 20, § 2; C.L. 1897, § 3078; Code 1915, § 3072; C.S. 1929, § 76-103; 1941 Comp., § 19-910; 1953 Comp., § 21-9-10.