Ark. Code Ann. § 16-46-102: Writing filed with pleading read as genuine unless denied

Where a writing purporting to have been executed by one (1) of the parties is referred to in and filed with a pleading, it may be read as genuine against that party unless he denies its genuineness by affidavit before the trial is begun.

Civil Code, § 580; C. & M. Dig., § 4114; Pope's Dig., § 5123; A.S.A. 1947, § 28-927.