UK Email Footer Legal Requirements: A Sector-by-Sector Reference

TL;DR: Every UK limited company, PLC, and LLP must include four specific details on external emails under the Companies Act 2006. Layered on top of that baseline, FCA-regulated firms have a statutory status disclosure to add, solicitors have an SRA Transparency Rules disclosure to add, and registered charities with gross income over £10,000 have a Charities Act 2011 disclosure to add — and the charity rule is narrower than most people assume. This article is a sector-by-sector reference with a copy-ready template for each. For the underlying Companies Act baseline in full, see Email Signature Compliance for UK Businesses: What the Law Actually Requires (2026).

The Companies Act baseline, briefly

Every external business email sent by a UK private limited company, PLC, or LLP must show four things in legible characters: the registered company name, the company registration number, the place of registration, and the registered office address. This comes from the Companies Act 2006 and applies to every employee, not just directors, on every external email.

That requirement, what it covers, who’s exempt, and the £1,000 penalty for non-compliance are explained in full in the companion article linked above. This article assumes that baseline and focuses on what changes once a sector-specific regulator is involved.

What the Trading Disclosures Regulations 2008 actually added

The Companies Act 2006 sets out the principle that companies must disclose certain information on business correspondence. The detail of what counts as “business correspondence” and exactly what must be shown came via a statutory instrument: the Companies (Trading Disclosures) Regulations 2008, in force since 1 October 2008.

Before 2008, the disclosure obligation sat in the Companies Act 1985 and predated routine business email. The 2008 Regulations restated the requirement under the new Companies Act 2006 framework and extended it explicitly to electronic communications — letters, order forms, and websites were already covered, and the Regulations made clear that the same four-element disclosure applies regardless of the medium. This is the specific legal basis for treating an email footer the same way you’d treat a printed letterhead: the medium doesn’t change the obligation.

The Regulations also clarify a detail that trips up companies with a trading name different from their legal name: if you trade under a name other than your full registered name, the registered name must still appear — the trading name can sit alongside it, but can’t replace it.

FCA-regulated firms: beyond the basic disclosure

For firms authorised by the Financial Conduct Authority, the Companies Act elements are a floor. Under GEN 4 Annex 1 of the FCA Handbook, solo-regulated firms must add a statutory status disclosure — “Authorised and regulated by the Financial Conduct Authority” — plus their Firm Reference Number, on every electronic communication including email.

Two points worth flagging that go beyond the basics:

Dual-regulated firms. Firms authorised by both the FCA and the Prudential Regulation Authority — mainly banks, insurers, and some larger investment firms — use different disclosure wording from solo-regulated firms. The Handbook specifies this separately; if your firm is PRA-authorised as well as FCA-authorised, check GEN 4 Annex 1 directly rather than copying a solo-regulated firm’s wording, since the two aren’t interchangeable.

Locking the disclosure in centrally managed signatures. If your organisation manages signatures through a central tool rather than relying on each employee to type their own, the regulatory disclosure line should be a locked field employees can’t edit or delete — not a free-text field they fill in themselves. A compliance gap that exists on every email an employee sends is a bigger exposure than one that exists on a single letter.

Solicitors and law firms: the SRA Transparency Rules

Law firms regulated by the Solicitors Regulation Authority have a specific disclosure obligation under the SRA Transparency Rules, distinct from the general Code of Conduct requirement to be open about regulatory status: an authorised firm’s correspondence, including email, should show its SRA authorisation number alongside the words “authorised and regulated by the Solicitors Regulation Authority.”

If the firm is a limited company or LLP, this sits on top of the Companies Act elements, not instead of them — an LLP law firm needs both its company registration number and its SRA number on the same footer. Note that the SRA’s digital badge (the logo-style authorisation mark) is licensed separately and shouldn’t be reproduced in an email footer without permission; the text disclosure is what’s required, not the badge graphic.

Whether to also reference the firm’s complaints procedure and the Legal Ombudsman in every email footer, as opposed to in engagement letters and on the firm’s website, is a matter of firm policy rather than a strict per-email requirement — but many firms include a short line for consistency.

Charities: company law, charity law, or both?

This is the area where most organisations get the scope wrong, because the relevant rule is narrower than the Companies Act equivalent.

If your charity is incorporated as a company limited by guarantee, it is a company for Companies Act purposes and the standard four-element disclosure applies in full, exactly as it would for any other Ltd.

Separately, under section 39 of the Charities Act 2011, any registered charity — whether incorporated as a company, a charitable incorporated organisation (CIO), or unincorporated — with gross income over £10,000 in its last financial year must state that it is a registered charity. The CIO structure exists precisely for charities that want incorporation without being a company, so this is often the only disclosure rule that applies to them; there’s no separate Companies Act layer because a CIO isn’t a company.

The part that’s commonly misunderstood: section 39 doesn’t apply to all correspondence the way the Companies Act applies to all business letters. It specifically covers notices, advertisements, and documents soliciting money or property for the charity, plus financial documents — bills, invoices, receipts, and cheques. A general operational email to a supplier isn’t squarely within the statutory wording the way a fundraising appeal email is. In practice, most charities include the registered charity number on every outbound email regardless, as a matter of transparency and convention rather than because section 39 strictly requires it for every message — the same legally-required-vs-convention distinction that applies to confidentiality disclaimers elsewhere.

Scottish and Northern Irish charities are regulated by OSCR and the Charity Commission for Northern Ireland respectively, under their own equivalent legislation. The principle is similar, but check the relevant regulator’s guidance directly rather than assuming the England & Wales threshold and wording apply unchanged.

Standard Ltd company:

[Trading name, if different from registered name]
[Registered company name] | Registered in England & Wales
Company registration number: XXXXXXXX
Registered office: [Full registered office address]

FCA-regulated firm (solo-regulated), add:

Authorised and regulated by the Financial Conduct Authority
FRN: XXXXXXX

Law firm (Ltd or LLP), add to the company/LLP elements above:

Authorised and regulated by the Solicitors Regulation Authority
SRA number: XXXXXX

Charity incorporated as a company limited by guarantee:

[Registered company name] | Registered in England & Wales
Company registration number: XXXXXXXX
Registered office: [Full registered office address]
Registered charity number: XXXXXXX

CIO or unincorporated charity (income over £10,000):

[Charity name]
Registered charity number: XXXXXXX

Whichever applies to your organisation, the operational risk is the same one most companies underestimate: these elements only stay correct on every email if they’re built into a centrally managed template rather than left to each employee to type and maintain themselves.

Frequently asked questions

Does the £10,000 charity income threshold reset every year?

Yes. Section 39 applies based on the charity’s gross income in its last financial year, from any source — not just donations. A charity that drops below £10,000 in a given year and stays there going forward would fall outside the requirement for that year, though most charities that have ever exceeded the threshold include the disclosure as standing practice rather than toggling it on and off.

Our charity is a company limited by guarantee. Do we need both disclosures?

Yes. The Companies Act disclosure (registered name, number, place of registration, registered office) applies because you’re a company. The Charities Act 2011 disclosure (registered charity number) applies separately because you’re a registered charity. Neither substitutes for the other.

Is a law firm structured as an LLP subject to both the Companies Act and the SRA Transparency Rules?

Yes. The LLP registration number and registered office come from the Companies Act 2006, since an LLP is incorporated. The SRA authorisation number and “authorised and regulated by” wording come from the SRA Transparency Rules, because the firm is also a regulated legal services provider. Both sit on the same footer.

Do we need the FCA’s exact wording, or can we paraphrase it?

Use the wording in GEN 4 Annex 1 as given. Regulatory status disclosures are not the place for marketing paraphrasing — a materially different form of words risks not satisfying the disclosure requirement at all, even if it conveys the same general meaning.

What about a charity registered in Scotland?

Scottish charities are regulated by OSCR (the Office of the Scottish Charity Regulator) under separate Scottish legislation, not the Charities Act 2011. The general principle — disclose registered charity status once you’re above a certain size — is similar, but the specific threshold and required wording should be checked against OSCR’s own guidance rather than assumed to mirror the England & Wales rule exactly.

This article is for general informational purposes and does not constitute legal advice. Requirements vary by organisation type, sector, and jurisdiction within the UK. If you are uncertain about your specific obligations, seek advice from a qualified solicitor or your relevant regulator. Information correct as of June 2026 — verify current requirements against legislation.gov.uk and your regulator’s published guidance.