Mo. Rev. Stat. § 107.120
Current with changes from the 2023 Legislative Session
Testimony in addition to that of such sureties may be required by the officer or court passing upon the sufficiency of such bonds; and when required it shall in every case be endorsed on or attached to the bond, subscribed by the witness or witnesses giving it, and duly attested.
§ 107.120, RSMo
RSMo 1939 § 3258