Colorado Real Estate Email Signature Rules (the Only State That Names Them) — 2026
Colorado is the only state whose rules use the words “email signatures” outright. It also has a provision written for email specifically, an exemption once you have disclosed to someone, and — as of 30 September 2026 — a renumbering that is about to make most existing citations wrong.
Step by step
Include your brokerage firm's name
The one affirmative requirement of general application. Rule 6.10.A.4 (becoming 6.10.A.3 on 30 Sept 2026): “All Advertising must be done clearly and conspicuously in the name of the Broker’s Brokerage Firm.”
Your own name is not required — not any more
Colorado changed this. Until 30 November 2021 the electronic-advertising rule required the broker’s name and the firm’s. That amendment deleted the broker-name requirement. Today only the brokerage firm’s name is compelled — though most agents include their own for obvious reasons.
Use the name on file with the Commission
Rule 6.10.A.2: no broker or brokerage firm may conduct or promote brokerage services “except in the name under which that Broker or Brokerage Firm appears in the records of the Commission.” A registered Trade Name may be used instead of, or alongside, the legal name.
Skip the license number
A verified negative: the phrase “license number” appears nowhere in 4 CCR 725-1 — not in the version in force, not in the version taking effect on 30 September — nor anywhere in C.R.S. §§ 12-10-201 to 12-10-227.
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Download freeUnlock Pro — one-time, no subscriptionOnce you have told a specific consumer, you need not keep repeating it
A genuine and unusual concession, in Rule 6.10.D.3: “once a Broker has disclosed the Broker’s Brokerage Firm to a specific Consumer, the Broker is not required to continue to make the same disclosure to the specific Consumer.” In practice one standing signature is still simpler than tracking who you have told.
Team name? Check it against the banned list
Rule 6.10.B.1 prohibits a team name containing Realty, Real estate, Realtors, Company, Corporation, Corp., Inc., LLC, LP or LLP — or any other term implying an entity separate from the brokerage firm. And 6.10.B.2: all team advertising must clearly and conspicuously include, and be in conjunction with, the firm’s legal or trade name.
Do not imply you are the employing broker
Rule 6.1.C: “Associate Brokers must not present or hold themselves out to the public as an Employing Broker or Independent Broker.” A signature title has to be accurate about which you are.
Only advertise designations you can verify
Rule 6.10.A.8: no broker may use a professional designation in advertising “unless the Broker is in good standing and the designation is easily verifiable by the public and the Commission,” and any advertised award or membership must be capable of verification.
Colorado names email signatures in the rule itself
No other state in this series does this. The definition of “Advertise or Advertising” at Rule 1.2 reads:
So in Colorado there is no interpretive work to do — your signature is advertising by definition, and must therefore carry the brokerage firm’s name clearly and conspicuously. Note the carve-out too: a bare email address or URL is not advertising unless it is used to promote services.
There is also a second, separate hook written for electronic communication. Rule 6.10.D.3: a broker who communicates “through email, chat, instant messages, newsgroups, discussion lists, bulletin boards, blogs, or other similar means for purposes of Advertising the Broker’s Real Estate Brokerage Services must use the Broker’s Brokerage Firm’s name.”
And for cramped formats, Rule 6.10.D.4 allows that where space is genuinely limited, the firm name may be disclosed “clearly and conspicuously within the first click of the mouse.”
Your citations are about to break — 30 September 2026
Colorado adopted amendments on 4 August 2026 that take effect 30 September 2026. They delete rule text that merely restated the statute, and renumber Rule 6.10:
- The firm-name requirement moves from 6.10.A.4 → 6.10.A.3
- The electronic-communication rule moves from 6.10.D.3 → 6.10.D.4
- In the team rule, “legal name” becomes “licensed name”
The substance does not change. But every guide citing 6.10.D.3 becomes wrong on 30 September, and this one is written to survive that — both numbers are given above.
Two more stale citations to watch for
“Rule E-8”. Colorado repealed its lettered rules and recodified everything into numbered chapters effective 1 January 2020. Advertising moved from Rule E-8 to Rule 6.10. Anything still citing E-8 is more than six years out of date.
“Colorado requires your name and your firm’s name.” True before 30 November 2021, false since. The amendment that removed the broker-name requirement is five years old and the claim is still circulating widely in blogs and continuing-education material.
One further sourcing trap: the Division’s own 2026 Colorado Real Estate Manual reproduces Rule 6.10 accurately, but its Chapter 1 definition numbering runs one behind the official code — a definition inserted at 1.11 in January 2026 shifted everything after it. Take definition numbers from the Secretary of State’s published code rather than from the Manual.
State law vs. the NAR Code
The wording differs in a way worth noting. Colorado requires the firm name “clearly and conspicuously”. NAR’s Standard of Practice 12-5 asks for a “reasonable and readily apparent manner” and expressly permits satisfying it via a link. Colorado allows a first-click disclosure only where space is genuinely limited — it is not a general link allowance. And NAR’s SoP 12-9 asks for state(s) of licensure on websites, which Colorado law does not require anywhere.
Sources: 4 CCR 725-1, Rules 1.2, 6.1.C–D, 6.10.A, 6.10.B, 6.10.D, 6.10.E, 6.11, 6.26 — version effective 30 January 2026 (in force) and version adopted 4 August 2026, effective 30 September 2026; C.R.S. §§ 12-10-203(9), 12-10-217(1); Colorado Division of Real Estate 2026 Colorado Real Estate Manual, Chs. 1–3; NAR 2026 Code of Ethics. Verified against the Colorado Secretary of State's published CCR filings and eDocket, September 2026.
What does your state actually require?
Pick a state. Every answer is taken from the current rule text and checked against that state’s own statute and regulations — not from a template, and not from the regulator’s summary of its own rules, which is wrong in twenty-six jurisdictions.
Named in the rule, handled in one click
Colorado’s rules put email signatures in the definition of advertising, so the brokerage firm’s name has to be there clearly and conspicuously. Autograph builds it once, installs it into Apple Mail in one click, and sets up your iPhone by QR code so the mobile signature carries the firm name too.
Download Autograph free See the templatesCommon questions
Does Colorado actually mention email signatures in its rules?
Yes, by name — and it appears to be the only state that does. Rule 1.2 defines advertising to include “business cards, brochures, websites, signage, property flyers, mailings (paper or electronic), social media, letterhead, email signatures, and contract documents.” So there is no argument to have about whether your signature counts.
Do I have to include my own name in my Colorado email signature?
Not as a matter of state law. Until 30 November 2021 the rule required the broker’s name and the firm’s; that amendment removed the broker-name requirement. Only the brokerage firm’s name is compelled now. The older claim is still repeated widely.
Does Colorado require my license number in advertising?
No. The phrase “license number” does not appear anywhere in the Commission’s rules — in the version in force or the one taking effect on 30 September 2026 — nor in the governing statutes.
I've already told this client which brokerage I'm with. Do I still need it in every email?
Not strictly. Rule 6.10.D.3 says that once you have disclosed your brokerage firm to a specific consumer, you need not keep making the same disclosure to that consumer. In practice a single standing signature is easier than tracking who has been told, and it covers the first contact with everyone new.
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