If a UK company trades, hires staff, opens a branch, sells goods or provides services abroad, it may need to register with a foreign tax authority.
The documents requested will depend on the country, the type of activity and the local tax rules. Even if the documents are valid in the UK, they may need certification, legalisation, translation or embassy attestation before they are accepted overseas.
Why foreign tax authorities ask for UK company documents
A foreign tax authority needs to confirm that the UK company exists, who controls it and whether it has authority to register or trade locally.
They may also need to verify the company’s address, directors, tax status, VAT position or financial background.
For formal registration, scanned or downloaded documents may not be enough.
Certificate of Incorporation
A Certificate of Incorporation is often requested as proof that the UK company legally exists.
It confirms the company name, registration number and incorporation date.
If the document is downloaded or printed, it may need solicitor or notary certification before legalisation.
Companies House records
Foreign tax authorities may ask for a company profile, company extract, confirmation statement, Memorandum and Articles of Association or director appointment records.
These documents help confirm the company’s structure, officers and registered details.
Printed Companies House documents may need to be certified before they can be legalised for overseas use.
Certificate of Good Standing
Some foreign tax authorities request a Certificate of Good Standing to confirm that the UK company is active and properly maintained.
This document may need to be recently issued, especially if it is being used for tax registration, branch registration or regulatory checks.
Check whether the receiving authority requires a specific issue date or validity period.
VAT, HMRC and tax documents
Foreign authorities may ask for proof of UK tax registration or tax residence.
This can include VAT certificates, HMRC letters, tax residency certificates, UTR-related correspondence, accountant letters or other tax records.
Many tax documents are issued digitally, so they may need solicitor or notary certification before legalisation.
Director and representative documents
If a director, accountant, lawyer or local agent is handling the tax registration, identity and authority documents may be required.
This can include passport copies, proof of address, board resolutions, authority letters or Powers of Attorney.
Passport copies and internal authority documents usually need certification or notarisation before legalisation.
Bank and financial evidence
Some tax registrations require evidence of company banking or financial activity.
This may include bank letters, account confirmation, audited accounts, invoices, commercial contracts or proof of trading.
Because these documents are often private or digital, they may need solicitor or notary certification before legalisation.
Translation and embassy attestation
If the foreign tax authority does not accept English documents, certified or sworn translation may be required.
For countries outside the Hague Apostille Convention, UK legalisation may not be the final step. Embassy or consular attestation may also be needed before the documents are accepted.
These steps should be checked early because tax registration can affect trading deadlines, invoicing and local compliance.
Confirm the tax authority’s checklist
Before preparing documents, ask the overseas accountant, lawyer, tax authority or local agent for a written checklist.
Confirm which documents are required, how recent they must be, whether originals or certified copies are accepted, whether notarisation is needed and whether translation or embassy attestation applies.
If your UK company needs foreign tax registration, 12 Apostille can review the document list, confirm the correct route and help prepare UK company paperwork for overseas submission.