Before you work with a business – whether you’re making a purchase, forming a partnership, or signing a service agreement – it’s important to know who you’re dealing with. That’s especially true if the company is new to you, appears online with little background, or operates in a sector where trust is crucial.
In some cases, you may be evaluating a limited company that claims to be fully registered and reputable. In others, they may be a sole trader, a partnership, or even a business registered overseas. Whatever the setup, taking a few minutes to verify their legitimacy can help you avoid fraud, financial loss, or reputational damage.
A 2024 study by Visa revealed that two in five (40%) UK small businesses lost money to fraud, and nearly a third of victims (29%) said it damaged their confidence as decision-makers.
This guide explains how to verify a UK company’s identity, check its records and online reputation, and spot warning signs before entering into any financial or legal arrangement.
Whether you’re making a one-off purchase from a business you’ve never heard of or considering a long-term partnership, trust is essential, and it starts with verification. Before you share any financial information, enter into a contract, or agree on terms, it’s important to confirm that the business is what it claims to be.
This might mean checking that:
Spending a few minutes verifying a company’s information can protect you from fraud, wasted time, and reputational harm. It helps ensure:
A business background check requires you to cross-reference company information provided on platforms like Companies House and HMRC. You’re looking for consistency. Cross-reference key details such as company registration numbers, business addresses, and people at the company. Legitimate companies will have matching details and make information like their company number easy to find for better transparency.
Look at the company’s website for documents on their terms of service or terms and conditions. Here you can find their company registration number. You can usually find a link to these documents at the very bottom of a website’s homepage.
Author's tip: Can’t find a company number? A legitimate business will have no trouble making it easy to find. Be cautious if you can’t see and verify one.
By law, every UK limited company must be re gistered with Companies House . Companies House lists important documents about companies that can be used to verify their legitimacy.
Enter the company number you found on its website to find it on Companies House. This will show you the company information and the filing history of the company documents.
If the company hasn’t been incorporated yet but wants to do business with you, this should raise questions about its legitimacy.
You can see the names of people at the company, such as directors and people with significant control (PSC). Later in step three, you’ll compare these names with director records in a business credit report – ensuring everything lines up accurately. It’s also a good idea to look up these names on LinkedIn – check their work history and any mutual connections you may have to verify their legitimacy.
On the Companies House search results, verify that:
Businesses with a total VAT taxable turnover of £90,000 or more over a 12-month period are legally required to register for VAT payments . VAT-registered companies will receive a unique VAT number, which you can use to check their details on the government’s official platform .
A valid number confirms the company is registered for VAT. HMRC’s records should match the information on Companies House, such as their business address and company number.
If the business isn’t registered for VAT – or if the VAT number doesn’t match the business details you’ve found on its website or provided materials – this could indicate either an error or, in some cases, a deliberate attempt to mislead.
Credit reporting agencies, such as Experian and Creditsafe , give you insights into a company’s financial health , showing you:
Director details can be verified against information on Companies House to see if the company is accurate and consistent in its reporting. Timely payments in a company’s credit history are a positive signal of financial reliability, which is beneficial if you plan to invoice over time.
This step is handy for entering a partnership or considering a significant transaction. If you find a poor credit history or active CCJs, this could signal that the company has low liquidity and could face trouble paying for your goods and services.
Be cautious if you notice any of the following warning signs when doing your checks. Sometimes it’s best to err on the side of caution if you see several inconsistencies, such as missing registration numbers or inactive status paired with a live website. This may indicate a higher risk of non-compliance and could mean the company isn’t a reputable business partner.
Watch out for these red flags on public registers, such as Companies House or GOV.UK:
If the company is registered at Companies House’s default address, that’s a big red flag. The default address is:
PO Box 4385, [COMPANY NUMBER] – COMPANIES HOUSE DEFAULT ADDRESS, Cardiff, CF14 8LH
Now that you’ve established that a company is legitimate and trading legally in the UK, should you trade with them? Not necessarily.
Just because a business is registered and compliant doesn’t guarantee it will deliver a good service. A company can be legally sound yet have issues that affect reliability, costs, or customer satisfaction. Before deciding, it’s worth digging a little deeper with a few extra checks:
Don’t be afraid to perform these extra checks to verify and help you get to know your potential business partners better. After all, this will be the start of building trust in your partnership.
Verifying a company protects you from fraud and helps you make safer business decisions. The same applies when setting up your own business – having it properly registered shows your customers and partners you’re legitimate and credible.
Registering your business with Rapid Formations will allow you to start on the right footing immediately. We’ll handle the company registration process on your behalf to ensure you meet all legal requirements in the UK.
Search by name or registration number on the official Companies House website to confirm if a UK company is legitimate. You can check its legal status (active, dissolved, or dormant), and see information like directors, filing history, and registered office location.
If a business operates in the UK but doesn’t appear on Companies House, it may not be registered as a limited company. Sole traders and partnerships, for example, aren’t required to register with Companies House. However, if a company is presenting itself as “Ltd” or “Limited” but can’t be found on the register, it could be trading illegally.