What Should a Small Business Email Signature Include?

By Bill Stilwell · Last reviewed October 17, 2026

The short answer

A business email signature should list the person’s name and role, the business name exactly as it appears on your sign and Google Business Profile (GBP), one main phone number, and your website. Add any disclosure your license or industry requires. Use one standard layout for everyone, so every email matches your website and listings.

What this means

The outline asks you to standardize four things: names, roles, contact information, and required disclosures.

A simple signature:

Person’s name and role
Business name, matching your legal or trade name and your GBP
One phone number, the same one on your listings
Website address
Required disclosures, if any, such as a license number

Made-up example: Every email from Copper Creek Electric ends with the sender’s name, “Copper Creek Electric,” the main office number, the website, and “Licensed electrical contractor, License No. [number].” Before, each person wrote their own, and two still showed the old phone number.

Why it matters

Wrong details spread. An old phone number in one signature gets saved in customers’ contacts and copied into directories.
Some industries require disclosures. Many state licensing boards have rules about showing license numbers in advertising. Rules vary by state and trade (see 9.5.7 License Display Rules).
Marketing emails have federal rules. Under the CAN-SPAM Act, a commercial email must include a valid physical postal address. The Federal Trade Commission (FTC) says a street address, a post office box registered with the U.S. Postal Service, or a registered private mailbox all work. Your marketing tool usually adds this, but check (see 18.3 Email Marketing Rules).
It looks like one business. A consistent signature is part of your brand (see 8.4.7 Brand Consistency).

Who this applies to

Every business that sends email. Licensed trades and regulated professions should check their board’s rules. Anyone sending marketing email must follow CAN-SPAM, which applies to business-to-business email too.

How to do it

Write one template with the fields above.
Match your listings. Copy the business name, phone, and website from your GBP so they’re exactly the same (see 14.1.1 Business Name and 14.1.4 Phone).
Check required disclosures. Look up your state licensing board’s rules on license numbers in ads, and ask whether email counts.
Keep it short. Skip long quotes, many images, and multiple phone numbers.
Be careful with claims. Words like “best” or “guaranteed” in a signature are advertising claims too (see 11.3.1 Truthful Advertising Claims).
Optional: add one link to your review page or booking page. If you add a review link, keep the wording neutral, like “Share your feedback,” and never offer a reward (see 14.6.2 Neutral Review Requests).
Roll it out to everyone, including shared inboxes. Many email providers let an admin set a standard signature.
Review it whenever your phone, address, license, or website changes.

What proof to keep

A copy of the standard signature template with the date
A screenshot of each person’s signature, or the admin setting that applies it
Notes on license display rules you checked

Common mistakes

Old phone numbers left in signatures after a change.
A business name that doesn’t match your sign and GBP.
A personal cell number that customers then call forever.
Missing license numbers where the board requires them.
Signatures made of images only. They may not display, and the text can’t be copied.
Review links that sound like “Leave us 5 stars.” That’s not a neutral request.

When to get help from a pro

Your state licensing board or an attorney can tell you what disclosures your trade needs. Questions to ask:

Do I have to show my license number in emails or only in ads?
Does my email count as advertising under our state rules?
Are there words I’m not allowed to use about my services?

Bill’s note

[Bill: add a short note. For example, how mismatched signatures led to wrong phone numbers in a client’s listings, or the signature format you use at SiteSmarty.]

How I did this for SiteSmarty

[Date I did this:]
[What I actually did, step by step: the SiteSmarty signature template and where it’s set]
[What it cost and how long it took:]
[What surprised me or what I’d do differently:]
[Screenshot or photo to add, with private info blurred: the standard signature in a sent email]
[Result so far:]

Questions people ask

Do I need my license number in my email signature? It depends on your state and trade. Check your licensing board’s rules on showing license numbers in advertising.

Does a marketing email need my address? Yes. CAN-SPAM requires a valid physical postal address in commercial email. A registered post office box or private mailbox is allowed.

Should everyone use the same signature? Yes, with their own name and role. The business name, phone, and website should match across the team.

Should I put a review link in my signature? You can, with neutral wording and no reward.

Audit check

Question: Does every business email use a standard signature whose business name, phone, and website match the Google Business Profile, with any required disclosures?
Pass looks like: One template, matching details, required license info, short and text-based.
Fail looks like: Each person’s signature is different, old numbers, a different business name, missing disclosures.
Evidence to collect: The template, sample signatures, and notes on the licensing board’s rules.

Where this fits

Do this first: 12.1.2 Email Accounts and Shared Inboxes, 14.1.1 Business Name, 14.1.4 Phone

Do this next: 12.1.5 Email Forwarding Rules

Sources

Federal Trade Commission, "CAN-SPAM Act: A Compliance Guide for Business" (checked October 17, 2026)
Google Business Profile Help, "Guidelines for representing your business on Google" (checked October 17, 2026)

This page explains general rules and Bill's own experience. It is not legal, tax, or insurance advice. Talk to a qualified professional about your situation.