Colorado Code
Part 9 - Paper Ballots
§ 31-10-910. Procedures for Conducting Mail Ballot Election

(4.5) The signature of the eligible elector on the self-affirmation on the return envelope must be compared with the signature of the eligible elector on file in the statewide voter registration system, created in section 1-2-301, C.R.S., in accordance with section 31-10-910.3.

WARNING:
Any person who, by use of force or other means, unduly influences an eligible elector to vote in any particular manner or to refrain from voting, or who falsely makes, alters, forges, or counterfeits any mail ballot before or after it has been cast, or who destroys, defaces, mutilates, or tampers with a ballot is subject, upon conviction, to imprisonment, or to a fine, or both.
State of .... Municipality of ...., County of .... I, ...., affirm and say that I am a qualified and registered elector in the municipality of .... and state of Colorado; that my residence and post office address is ....; and that I herein enclose my ballot in accordance with the provisions of the "Colorado Municipal Election Code of 1965". I realize that if any false statements are contained herein that I shall be subject to prosecution for criminal action. .......................... .................................. Date Signature of voter
Source: L. 2014: Entire section added, (HB 14-1164), ch. 2, p. 63, § 20, effective February 18. L. 2016: (4.5) added, (HB 16-1070), ch. 130, p. 373, § 3, effective August 10. L. 2020: (2)(c)(I) amended, (HB 20-1156), ch. 51, p. 178, § 4, effective September 14.
Cross references: For the legislative declaration in HB 14-1164, see section 1 of chapter 2, Session Laws of Colorado 2014.