A Portuguese company seeking to establish a presence in the United Kingdom — whether through a subsidiary, branch office, or commercial partnership — must submit corporate documentation in British English to bodies such as Companies House, HMRC, or local financial institutions. Since Brexit, the requirements for recognising foreign documents have become considerably more demanding: Portugal and the UK no longer share the EU legal framework, which introduces additional apostille and certification steps that did not previously apply.
What Brexit Changed for Corporate Documents
Prior to 31 January 2020, Portuguese corporate documents circulated within the EU with relative ease. Following the UK’s withdrawal, Portugal and the UK now treat each other as third countries for the purposes of document recognition.
The practical consequences include:
- Mandatory apostille — documents issued by Portuguese public bodies (commercial registry certificates, notarial deeds, powers of attorney) require a Hague Apostille before submission to UK bodies.
- Certified translation required — Companies House and most UK financial institutions require translations certified by a qualified translator or a translation company with demonstrable professional credentials.
- Document validity periods — commercial registry certificates are typically valid for three months. The apostille and translation must be completed within that window.
- Consular legalisation — in specific circumstances, additional legalisation through the British Consulate in Lisbon may be required, depending on the document type and the receiving institution in the UK.
Corporate Documents Most Commonly Required
Expansion into the UK market typically involves a recurring set of documents that require translation and certification:
| Document | Issuing body in Portugal | Note |
|---|---|---|
| Permanent commercial registry certificate | Conservatória do Registo Comercial / IRN | Proof of existence and legal representation |
| Articles of association / bylaws | Notarial office | Foundation of the corporate structure |
| Minutes appointing directors or managers | Notary or general meeting | Confirms powers of representation |
| Power of attorney | Notarial office | Common for account openings and contracts |
| Tax registration declaration | Autoridade Tributária | Required by some commercial partners |
| Financial statements / annual accounts | Certified accountant | Required by UK banks and investors |
Each document must be translated in full — including stamps, seals, and marginal notes — for the translation to be considered valid by UK recipients.
Certified Translation vs. Simple Translation: What the UK Accepts
In the UK market context, the distinction between a simple translation and a certified translation is decisive. A simple translation has no formal legal standing and is not accepted for submission to regulatory bodies, banks, or courts.
A certified translation is one in which the translator or translation company provides a written statement confirming that the translation is complete and accurate. This statement typically includes:
- The translator’s name and qualifications
- The date of translation
- A declaration of accuracy and completeness
- The translator’s signature and, where applicable, the company’s stamp
The UK does not operate a sworn translator system equivalent to that in Portugal or many other European countries. Certification is provided by the translator or the translation company directly, and ISO 17100 certification is a recognised quality indicator accepted by demanding UK institutions. Law firms and regulated businesses in the UK increasingly regard translations from ISO 17100-certified providers as evidence of professional competence.
For documents intended for court proceedings in the UK, a translation accompanied by a sworn statement before a UK solicitor or notary public may be required — a procedure distinct from the Portuguese *tradução juramentada*.
Common Mistakes That Delay the Process
Delays in opening branch offices, bank accounts, or completing contractual processes in the UK frequently originate from avoidable errors:
- Partial translation — omitting stamps, footnotes, or annexes that form part of the original document
- Apostille obtained after translation — the apostille should be affixed to the original document before it is submitted for translation, or the translation must explicitly reference the apostille number and date
- Expired documents — certificates obtained too far in advance may lapse before the process is complete
- Non-standard certification wording — certification statements that do not follow an accepted format may be rejected by UK institutions
- Wrong English variant — documents for Companies House or HMRC must be in British English, not American English
M21Global: Certified Translation for the UK Market
M21Global has direct experience supporting companies through UK market-entry processes, providing certified translation of corporate documents in the Portuguese–British English language pair. Certified to ISO 17100:2015 (Bureau Veritas), M21Global produces certification statements in the format accepted by UK bodies including Companies House and financial institutions. The service includes documentary compliance review and guidance on the correct sequence of apostille, translation, and submission.
Request a quote for your corporate document translation at m21global.com, or contact the team directly to start the process without delay.
Frequently Asked Questions
Does the UK accept Portuguese sworn translations (tradução juramentada)?
The UK does not recognise the Portuguese sworn translator system. For UK purposes, a certified translation is required, in which the translator or translation company provides a written declaration of accuracy and completeness. ISO 17100 certification is a widely recognised quality indicator for UK institutions.
Do Portuguese corporate documents need an apostille before submission to Companies House?
Yes. Since Brexit, Portugal and the UK treat each other as third countries for document recognition purposes. Portuguese public documents — such as commercial registry certificates and notarial deeds — require a Hague Apostille before UK bodies will accept them.
How long does certified translation of corporate documents take?
Timescales depend on the volume and complexity of the documents. Urgent translations can typically be completed within 24 to 48 hours. It is advisable to coordinate the apostille process, translation, and certificate validity periods to avoid documents expiring before submission.
What must the certification statement include for UK acceptance?
The statement should include the translator’s name and qualifications, the date of translation, a declaration of accuracy and completeness, and the translator’s signature. Some UK institutions also require the translation company’s stamp or letterhead.
Do articles of association also need certified translation?
Yes. Articles of association are part of the core documentation required for registration and account-opening processes in the UK, and must be translated in full — including annexes, seals, and marginal notes — with an accompanying certification statement.
