C.R.S. § 7-42-117
7-42-117. Proof of right to certificate
7-42-117. Proof of right to certificate. The corporation may require any legal representative or assignee of a stockholder of record to prove the stockholder's legal right to such certificate as a legal representative or assignee of the stockholder of record. The corporation may require any lienholder named in the books of the corporation as a lienholder on the lost certificate to prove the lienholder's legal right to such certificate.