Any instrument affecting the title to real property, 3 years after the instrument has been copied into the proper book of record kept in the office of any county recorder, imparts notice of its contents to subsequent purchasers and encumbrancers, notwithstanding any defect, omission or informality in the execution of the instrument, or in the certificate of acknowledgment thereof, or the absence of any such certificate; but nothing herein affects the rights of purchasers or encumbrancers previous to March 27, 1935. When such copying in the proper book of record occurred within 5 years prior to the trial of an action, the instrument is not admissible in evidence unless it is first shown that the original instrument was genuine.
NRS 111.347