C.R.S. § 13-80-115: Endorsement by payee - effect.

Nothing in this article shall alter, take away, or lessen the effect of a payment of any principal or interest made by any person; but no endorsement or memorandum of any such payment, written or made upon any promissory note, bill of exchange, or other writing, by or on behalf of the party to whom such payment is made, or purports to be made, shall be deemed sufficient proof of the payment so as to take the case out of operation of the provisions of this article.