9-407. Evidence of admission of execution. Where, however, evidence is given that the party against whom the writing is offered, has at any time admitted its execution, no other evidence of the execution need be given, when the instrument is one produced from the custody of the adverse party, and has been acted upon by him as genuine.
[(9-407) C.C.P. 1881, sec. 928; R.S., R.C., & C.L., sec. 5995; C.S., sec. 7966; I.C.A., sec. 16-407.]