How to Verify a Company Registration Certificate Online (UK Guide 2026)

A company registration certificate -- formally known as a certificate of incorporation in England and Wales -- is the foundational document that proves a company has been legally formed and registered with Companies House. It confirms the company's registered number, date of incorporation, company name, and type (limited by shares, limited by guarantee, LLP, etc.). For any organisation conducting business-to-business due diligence, verifying this document against the official register is a non-negotiable step.

The UK's Companies House register is one of the most transparent corporate registries in the world, offering free online access to company filings and registration data. Yet the ease of access also makes it straightforward for fraudsters to create convincing forgeries. This guide explains how to verify a company registration certificate online, what information each verification source provides, and how to build this check into a structured KYB (Know Your Business) process.

What a UK Certificate of Incorporation Contains

When a company is incorporated at Companies House, it receives a certificate of incorporation that records:

• Company name as registered
• Company number (a unique 8-character identifier, typically numeric for England/Wales companies, prefixed SC for Scottish companies, NI for Northern Irish companies)
• Date of incorporation
• Company type (private limited by shares, public limited company, LLP, etc.)
• Registered office jurisdiction (England and Wales, Scotland, or Northern Ireland)

Since 2016, Companies House has issued digital certificates of incorporation by default. Paper certificates are available on request for an additional fee. The digital certificate is a PDF bearing a digital authentication code that can be verified against the Companies House records.

It is important to note that a certificate of incorporation is issued once, at the point of company formation. It does not confirm the company's current status (active, dissolved, in liquidation), current directors, or registered office address. For current information, you need a confirmation statement (formerly the annual return) or a live company search.

Certificate of Incorporation vs. Confirmation Statement

For due diligence purposes, the certificate of incorporation confirms that the company exists and was validly formed, but a current company search is needed to verify ongoing trading status and director information.

How to Verify a Company Registration Certificate Online

Companies House Free Search Service

The Companies House "Find and update company information" service is the primary verification tool. It is entirely free and requires no account to use.

To verify a certificate of incorporation:

Step 1: Navigate to the Companies House search page and enter the company number from the certificate (or the company name).

Step 2: Compare the information displayed against the certificate. Check that the company name, number, date of incorporation, and company type match exactly. Any discrepancy is a red flag.

Step 3: Review the company's current status. The register will show whether the company is active, dissolved, in liquidation, or dormant. A certificate of incorporation for a dissolved company may be genuine but misleading if presented as evidence of current trading status.

Step 4: Check the filing history. A legitimate company will have a trail of annual confirmation statements, accounts filings, and any relevant officer change notifications. A company with no filing history beyond incorporation may be a shell entity.

Companies House WebFiling

WebFiling is the online filing portal for companies and their agents. While primarily a filing tool, it also provides access to company records and can be used to verify company information. Companies House account holders (free registration) can access more detailed filing histories and receive email alerts when filings are made against specific companies.

Setting up monitoring alerts is particularly useful for ongoing due diligence: you receive notification when a company files accounts, changes directors, or is subject to a striking-off action.

Companies House API

For organisations verifying companies at scale, the Companies House REST API provides programmatic access to the full register. The API is free to use with a registered API key and supports:

• Company profile searches (name, number, status, SIC codes, registered address)
• Officer searches (current and resigned directors, secretaries)
• Filing history retrieval
• Persons with significant control (PSC) register data
• Charges (secured lending) data

The API returns JSON responses and is well suited for integration into automated onboarding workflows. Rate limits apply but are generous for most business verification use cases.

Comparison of UK Company Verification Sources

What to Check Beyond the Certificate

Verifying the certificate of incorporation is the first step, but a thorough business verification process should extend to several additional checks.

Persons with Significant Control (PSC)

Since April 2016, UK companies are required to maintain a PSC register identifying individuals who hold more than 25% of shares or voting rights, or who otherwise exercise significant influence or control. The PSC data is publicly available on the Companies House register and should be reviewed as part of any KYB process to understand the ultimate beneficial ownership structure.

The UK PSC register has been subject to increasing scrutiny since the Economic Crime (Transparency and Enforcement) Act 2022, which established the Register of Overseas Entities to extend similar transparency requirements to foreign entities owning UK property (legislation.gov.uk). Companies House verification powers have been enhanced under the Economic Crime and Corporate Transparency Act 2023, enabling the registrar to query and reject filings that appear inconsistent.

Confirmation Statement Filing

A company that has not filed a confirmation statement within 14 days of the anniversary of its incorporation (or the previous confirmation statement) is in breach of its filing obligations under Section 853A of the Companies Act 2006. Companies House can initiate striking-off proceedings for persistent non-compliance. A missing or overdue confirmation statement is a meaningful risk indicator.

Accounts Filing

All UK limited companies must file annual accounts with Companies House. The filing deadline depends on company type: 9 months after the accounting reference date for private companies, 6 months for public companies. Overdue accounts are publicly flagged on the register and may indicate financial distress, administrative neglect, or a dormant shell entity.

Director Verification

The certificate of incorporation does not name directors (they are appointed at or after incorporation and notified separately). To verify the identity of the persons claiming to represent a company, cross-reference the director information on the Companies House register with the identity verification documentation provided by the individual.

Integrating Company Verification into a KYB Workflow

A structured Know Your Business workflow should follow a clear sequence:

1. Collect the certificate of incorporation from the prospective business partner or obtain the company number from initial correspondence.

2. Search Companies House to verify the company's existence, status, and basic details.

3. Review PSC and director data to identify the individuals behind the company and confirm they match the persons you are dealing with.

4. Check filing compliance (confirmation statements, accounts) as a proxy for operational legitimacy.

5. Cross-reference with vendor compliance checks where applicable, particularly for regulated sectors or high-value contracts.

6. Set up monitoring via Companies House WebFiling alerts or API polling to detect material changes during the business relationship.

For organisations processing large volumes of business partner verifications, manual checks against Companies House become a bottleneck. Document verification solutions can automate the extraction of data from registration certificates, cross-reference it with official records, and flag discrepancies in seconds rather than minutes.

CheckFile.ai automates business document verification, including company registration certificates, with real-time cross-referencing against official data sources. View pricing for volume-based plans suited to compliance teams.

Common Red Flags in Company Registration Verification

Professional due diligence analysts monitor for several patterns that may indicate elevated risk:

• Very recent incorporation date combined with an immediate request for high-value contracts or credit
• Registered office at a virtual office or mail forwarding address without a demonstrable physical presence
• No filed accounts beyond the first accounting period
• Frequent director changes, particularly multiple resignations in a short period
• Company name very similar to a well-known brand (typosquatting or passing-off attempts)
• Discrepancies between the certificate and the register, which may indicate document tampering

None of these factors is conclusive on its own, but in combination they warrant enhanced due diligence.

Frequently Asked Questions

Is the Companies House register free to search?

Yes. The Companies House "Find and update company information" service is entirely free and open to the public. No registration is required for basic searches. The Companies House API is also free to use with a registered developer account.

How often is Companies House data updated?

Companies House data is updated in real time as filings are processed. Electronic filings (which account for the majority of submissions) are typically processed within 24 hours. Paper filings may take longer. The register reflects the most recently accepted filing, not necessarily the current factual position of the company.

Can I verify a company registration certificate from outside the UK?

Yes. Companies House services are accessible globally via the internet. There are no geographic restrictions on searching the register or using the API. For companies registered in other jurisdictions (Scotland, Northern Ireland), the same Companies House register applies. For Crown Dependencies (Jersey, Guernsey, Isle of Man) or overseas territories, separate registries operate and must be consulted directly.

What is the difference between a company number and a CRN?

They are the same thing. CRN stands for Company Registration Number, which is the unique identifier assigned to every company on the Companies House register. It appears on the certificate of incorporation and all subsequent filings.

How do I verify a dissolved company?

Dissolved companies remain searchable on the Companies House register. The company status will show as "Dissolved" and the dissolution date will be recorded. Historical filings (accounts, confirmation statements, officer appointments) remain available. A certificate of incorporation for a dissolved company is not evidence of current trading capacity.

---

The information in this article is provided for informational purposes and does not constitute legal advice. Regulatory obligations change over time. Consult a qualified legal professional for advice specific to your compliance requirements.