Article 14 of Law of Evidence

A private instrument shall not constitute evidence against third parties as to its date except from the time it acquires an established date. The date of an instrument shall be established: First - From the day it is entered in the register maintained for that purpose. Second: Or from the day it is endorsed by a competent public official. Third: Or from the day of the death of any person having an acknowledged mark on the instrument consisting of handwriting, a signature or a fingerprint, or from the day it becomes impossible for any such person to write or affix a fingerprint owing to a bodily infirmity. The judge may also, as circumstances require, recognize its date as established from the day of the death of the person who signed the instrument with an acknowledged seal. Fourth - Or from the day of the occurrence of any other event conclusively establishing that the instrument was issued before its occurrence. Fifth – Or from the day its contents are written in another instrument having an established date. Nevertheless, the judge may, depending on the circumstances, refrain from applying the provision of this Article to receipts of discharge.