Colorado Amendment 84 (2026), explained

This was on the Colorado ballot on Tuesday, November 3, 2026. No recommendation, just what it does and both sides.

Failed (projected)Votes are still being counted, as of Sunday, November 8, 2026, per Colorado Politics.

Amendment 84Constitutional amendment · Citizen initiative

ID number on mail ballots

Explain it like I'm 5

Mail voters would still sign their ballot and would also write part of an identification number. It is like adding a second check to make sure the ballot belongs to the right voter, but mistakes could cause extra work or delay.

Yes vote

Mail voters must provide a signature and an identification number on the ballot envelope, subject to the measure’s verification and correction rules.

No vote

Colorado continues using its current signature-based mail-ballot verification process.

The question to ask yourself

Would an added ID-number check improve security enough to justify extra errors, privacy concerns, and cost?

The case for

  • Adds another identity check to the existing signature review.
  • Supporters say an ID number is more objective than handwriting comparison.
  • A correction process can allow voters to fix some missing or mismatched information.

Backed by: Colorado Voter Trust Initiative, Independence Institute

The case against

  • Colorado already verifies mail ballots through signatures and related election procedures.
  • Missing or mistyped numbers could delay or reject valid ballots.
  • The requirement creates privacy and access concerns without an established need.

Opposed by: ACLU of Colorado, League of Women Voters of Colorado, The Bell Policy Center, New Era Colorado, Democratic Party of Colorado

Money
The estimates provided range from about $2.5 million in initial state spending to up to $2.7 million initially and about $1.2 million annually, so the exact cost is uncertain.
Don't be misled
It is misleading to say this ends mail voting, because it changes verification requirements rather than eliminating mail ballots.

Free account: 3 questions, no card. Your question will be waiting in the chat.

Written by ChatGPT, Claude, Gemini and Grok with web search, then checked against each other. See where they disagreed on Colorado. Your sample ballot and the official voter guide are the final word. Look up your sample ballot.

Also on the Colorado ballot

  1. Amendment 81Police immigration notices
  2. Amendment 82Natural gas access right
  3. Amendment 83Right to hunt and fish
  4. Amendment 85Plain-language ballot questions
  5. Amendment 86Mid-decade map approval rules
  6. Amendment 87Graduated state income tax
  7. Proposition 132Tougher fentanyl crime penalties
  8. Proposition 133Life without parole for child trafficking
  9. Proposition 134School sports by biological sex
  10. Proposition 135Ban certain surgeries for minors
  11. Proposition 136Cap income tax at 4.4 percent
  12. Proposition 137Sporting-goods tax for conservation
  13. Proposition NNKeep TABOR surplus for schools