Alteration in writing.
Section 336
SEC. 336. Alteration in writing. — The party producing a writing as genuine which has been altered, and appears to have been altered after its execution, in a part material to the question in dispute, must account for the appearance of the alteration. He may show that the alteration was made by another, without his concurrence, or was made with the consent of parties affected by it or otherwise properly or innocently made, or that alteration did not change the meaning or language of the instrument. If he do that, he may give the writing in evidence, but not otherwise.