C.R.S. § 1-9-210
1-9-210. Copy of challenge delivered to elector
1-9-210. Copy of challenge delivered to elector. When a challenge is made to a person who cast a mail ballot or provisional ballot and the person was not present at the time of the challenge, the county clerk and recorder or designated election official shall notify and mail a copy of the challenge to the person challenged in accordance with the rules of the secretary of state.