Is a company letterhead legally required to include a registration number or business ID in the US?

No. Unlike the UK, Malta, Cyprus, or Gibraltar, there is no US federal or (in the ordinary case) state statute requiring a business to print its registration number, EIN, or any other identifier on ordinary letterhead. US company registration runs through 51 separate state and DC filing offices, and the resulting number is used in filings with that office, not mandated on correspondence. Businesses that add an EIN or state entity number do it because it's useful for the recipient, not because a law requires it.

What's the one real exception — is there any US letter that legally must say something specific?

Yes, and it's narrow: the Fair Debt Collection Practices Act, 15 U.S.C. §1692e(11), requires a debt collector's initial written communication to disclose that it's from a debt collector attempting to collect a debt, and that any information obtained will be used for that purpose — with a shorter required disclosure in later communications. This is often called the "mini-Miranda." It applies specifically to debt collectors, not to business correspondence generally, so it doesn't create a template rule for anyone outside that industry.

I'm an attorney — are there special rules for law firm letterhead?

Yes, but they're professional-conduct rules, not a general letterhead statute. State Rules of Professional Conduct (built on ABA Model Rule 7.1, and in several states a standalone Rule 7.5, "Firm Names and Letterheads") require that a firm's name and any credentials listed not be false or misleading, and multi-jurisdiction firms typically need to note where each listed lawyer isn't licensed. The specific requirements vary by state bar, so check your state's rule rather than assuming a national standard.

Do I need to put my state of incorporation or registered agent on my letterhead?

Not as a general rule. Naming your state of formation ("a Delaware LLC") is a common convention on formal letters and contracts because it tells the reader which state's law governs the entity, and every LLC or corporation is required to maintain a registered agent — but that agent requirement is a filing obligation with your state, not a requirement to print the agent's details on your letterhead. Some businesses include one or both anyway for clarity; neither is legally mandatory on ordinary correspondence.

Should a US letterhead use Letter size or A4, and does it need fold marks?

US Letter — 8.5 × 11 in, formally ANSI A under ANSI/ASME Y14.1 — not A4, which is a common default on generic template sites built for a global audience. No, don't add fold marks: printing fold or punch guides (standard on German DIN 5008 letterhead) isn't an American convention and reads as an imported template rather than a domestic one. Every template here renders at true US Letter with the address block positioned for a standard #10 window envelope, and no fold marks.

Do I need to create an account or pay to use these letterhead templates?

No. You can browse the gallery, edit a template, and export it as a PDF or Word file without signing up or paying. That's a deliberate contrast with Canva, which requires an account before you can edit a letterhead and applies a watermark to some "free" templates that use Pro-only design elements, and with Microsoft's Word-based templates, which require signing into a Microsoft account to edit.

Free Letterhead Templates – Customize & Download Online

Is a US business letterhead legally required to say anything? Almost never — here's the one real exception

Search around and you'll find plenty of sites implying there's a rulebook for American letterhead the way there is for a UK limited company or most of the EU. There isn't. No federal statute, and in the ordinary case no state statute either, tells a US business what has to appear on its letterhead. Company registration in the US is handled by 51 separate state (and DC) filing offices, and none of them requires the resulting file number to show up on your stationery — it lives in your state's business registry, not on your letters. That's a genuine, checkable difference from the UK's Companies (Trading Disclosures) Regulations 2008 or Germany's HGB, and this page says so plainly instead of inventing a rule to sound authoritative.

What does exist is narrower and more interesting than a blanket rule: a single federal statute that forces specific wording onto one category of business letter (debt collection), plus a handful of state professional-conduct rules that bind licensed occupations, plus a strong, decades-old convention of what American letterhead customarily carries even though nothing compels it. This tool ships templates built for that reality — true US Letter sizing, a #10-window-ready address block, and fields for the details businesses actually use, without pretending any of it is mandatory when it isn't.

The mandatory/customary line: what US law actually requires vs. what businesses just do

Start with the negative, because it's the finding that matters most: there is no general US law — federal or state — requiring a private company to print its name, registration number, address, or anything else on ordinary business letterhead. This is a real structural gap compared to Europe. The UK's Companies Act forces the company registration number onto business letters; Malta's Companies Act does the same; Cyprus and Gibraltar have their own versions. The US has nothing equivalent for garden-variety correspondence, because US corporate registration is a state-by-state filing system (51 registrars, 51 numbering schemes) built for filings with that state, not for outbound mail.

The one place a federal law genuinely reaches into letter content is debt collection. The Fair Debt Collection Practices Act, 15 U.S.C. §1692e(11), requires debt collectors to disclose — in their initial written communication, and in an abbreviated form afterward — that the communication is from a debt collector attempting to collect a debt and that any information obtained will be used for that purpose. Collection-industry writers call this the "mini-Miranda." It's real, it's specific, and it applies only to that one category of sender. If your business isn't collecting a debt, it doesn't apply to you, and no general-purpose letterhead disclosure fills the gap it leaves for everyone else — because there isn't a gap; there's simply no general rule.

Below that federal floor, a few state and licensing rules do bind specific professions — a licensed attorney's letterhead is governed by that state's Rules of Professional Conduct (built on ABA Model Rule 7.1, with several states retaining a numbered Rule 7.5 on "Firm Names and Letterheads"), and a California-licensed contractor must put a license number on contracts, bids, and advertising under Business & Professions Code §7030.5 — note the statute's own text doesn't use the word "letterhead," though many contractors include the number there anyway because their advertising and correspondence overlap. Outside sector-specific rules like these, what actually shows up on American letterhead — company name, address, phone number, sometimes an EIN or a state entity designation like "LLC" or "Inc." — is there because it's useful and customary, not because a statute demands it. Every template in this gallery includes those customary fields; none of them are labeled as a legal requirement, because they aren't one.

Built for US Letter, not resized from A4 — and there's no ANSI standard for the letter itself

The one thing about American paper that is formally standardized is the sheet size, not the letter's layout. ANSI/ASME Y14.1 designates 8.5 × 11 in as "ANSI A," codifying a size that's been the US default since roughly 1921 and became the federal government's standard size in the early 1980s. That's real and worth stating plainly — but it's a drawing-sheet standard, not a business-correspondence standard, and nothing in it (or anywhere else) prescribes margins, address-block position, or envelope alignment for a private company's letter. Every template on this page renders at true 8.5 × 11 in, not a rescaled A4 sheet with the numbers changed — a distinction that matters because several competitors default to A4 in their generic gallery and only special-case US Letter where they remember to.

Beyond paper size, what the US has instead of a formal standard is a set of named, taught-but-not-mandated letter formats: full block (everything flush left — the modern default), modified block (date and closing shifted to center), semi-block (modified block with indented paragraphs), and the rarer AMS Simplified format, which drops the salutation and closing entirely in favor of an all-caps subject line. Purdue OWL and the (now out-of-print) Gregg Reference Manual are the closest things the US has to an authority on this, and both are silent on anything resembling Germany's fold marks or hole-punch guide — because American letterhead doesn't use them. This tool deliberately leaves fold marks off every US template; printing them here doesn't add polish, it marks a letter as imported from a DIN 5008 country.

The address block on every template is positioned to land inside the standard #10 window envelope — 4⅛ × 9½ in overall, with a window roughly 1⅛ × 4½ in set 7/8 in from the left edge and ½ in up from the bottom — so a tri-folded page shows the recipient's address correctly without a separate envelope-printing step. That window position is a market convention set by envelope manufacturers, not a government standard, and this page says so rather than dressing it up as one.

Where Canva, Microsoft and the free template sites actually fall short

Canva ranks #1 for "letterhead template" and its gallery page is genuinely thin underneath the surface: a direct fetch of canva.com/letterheads/templates/ returned a 3 KB page shell with essentially no server-rendered content — the whole gallery has to boot as client-side JavaScript before a single template appears, and non-current browsers get served an "update your browser" notice instead of templates. More to the point for this page's audience: you cannot open a Canva letterhead in an editable state without creating an account first, and once you're in, some "free" templates use Pro-only elements that apply a watermark until you pay.

Template.net is the strongest text competitor on this SERP — genuinely useful explainer copy — but its downloads push a subscription upsell, and its paper-size guidance mentions both 8.5×11 and A4 without saying which one belongs to which country's convention. Microsoft's letterhead templates recently migrated from create.microsoft.com to m365.cloud.microsoft, which now 301-redirects the old URL — mid-migration, with no paper size stated on the landing page at all — and using the editor still means signing into a Microsoft account. VistaPrint's letterhead product is print-only with no plain digital download and a 25-sheet minimum order, which is the wrong tool entirely if you just need a PDF today.

None of the ten competitor sites checked for this page mention block vs. modified block vs. AMS Simplified format, the #10 window-envelope dimensions, USPS Publication 28's addressing rules, or Army Regulation 25-50 — the one place a US letterhead format actually is mandatory, for government and military correspondence. They sell a picture of a letterhead; this page tries to ship the correctly laid-out letter underneath it, at true US Letter size, without an account or a watermark.

What US businesses commonly add anyway — and where the line to "required" actually sits

Even without a general legal mandate, most US businesses put a fairly consistent set of details on their letterhead: legal name (including the entity suffix — LLC, Inc., Corp. — where one exists), street address, phone number, and often a website or email. Beyond that customary baseline, three additions show up often enough to be worth naming specifically, along with an honest note on why each one is there:

An Employer Identification Number (EIN) sometimes appears on formal business correspondence, particularly from accountants, payroll firms, or anyone corresponding about tax matters — useful for the recipient, not legally required on general letterhead. A state of incorporation or formation ("a Delaware LLC," "an Ohio corporation") is common on formal contracts and letters from lawyers and accountants because it clarifies which state's law governs the entity — again a convention, not a universal mandate for correspondence. And a registered agent's name and address is a piece of information every LLC and corporation must maintain on file with its state — but that filing requirement is with the state, not a requirement to print the registered agent on your letterhead.

The professions where something closer to an actual rule exists are narrower than people searching for this topic often expect: licensed attorneys, whose firm name and any listed credentials are governed by that state's Rules of Professional Conduct; California-licensed contractors, who must show their license number on contracts, bids, and advertising under Business & Professions Code §7030.5; and, for a very different audience, US Army personnel, for whom Army Regulation 25-50 makes letterhead mandatory on page one of official memoranda, with fixed margins and an unjustified right edge. If your business doesn't fall into one of those categories, the honest answer is that what you put on your letterhead is a business decision, not a compliance one.

Letterhead templates built for US Letter

Is a US business letterhead legally required to say anything? Almost never — here's the one real exception

The mandatory/customary line: what US law actually requires vs. what businesses just do

Built for US Letter, not resized from A4 — and there's no ANSI standard for the letter itself

Where Canva, Microsoft and the free template sites actually fall short

What US businesses commonly add anyway — and where the line to "required" actually sits

Frequently asked questions about US business letterhead