If the contract is not set forth as the basis of the action, so as to require a denial under oath, an alteration in a material part requires explanation before it can be admitted as evidence. This preliminary proof shall be submitted to the court.
History. Orig. Code 1863, § 2795; Code 1868, § 2803; Code 1873, § 2854; Code 1882, § 2854; Civil Code 1895, § 3704; Civil Code 1910, § 4298; Code 1933, § 20-804.