Colo. Rev. Stat. § 39-11-129
The words "issue", "issued", "execute", and "executed" when used in this article in connection with a treasurer's deed mean the signing of such a deed by the treasurer, and the delay in the acknowledgment of such a deed or the delivery thereof shall not in any way affect the validity of such deed. If the notice required in section 39-11-128 for a deed is prepared subsequent to three years after the date of sale of a tax lien for delinquent taxes, it shall not be necessary to make any statement in such notice concerning the time of expiration of the period of redemption. The treasurer may sign such treasurer's deed at any time after the time specified therefor in such notice if no redemption has then been made, if the signing of such deed is within five months from the service of said notice as required in section 39-11-128.
C.R.S. § 39-11-129