Almost every online casino aimed at British players displays a licence claim somewhere near the bottom of the page. Reading that claim tells you what the site wants you to believe. Checking it tells you whether it is true, and it takes about two minutes because the underlying list is public.
What a licence actually is
Under the Gambling Act 2005, a business that provides facilities for gambling to people in Great Britain needs an operating licence from the Gambling Commission — regardless of where in the world the company itself is registered. A licence issued anywhere else, however respectable that regulator may be, does not grant permission to serve this market.
Operating licences are not generic. They are split two ways at once:
By activity. Casino, bingo, general betting, pool betting, gaming machines, lotteries, software supply and so on are separate things to be licensed for. A company can hold one and not another.
By method. Remote, non-remote, or ancillary remote. "Remote" is the regulatory word for online and other communication-based gambling.
So the phrase you are looking for on a register entry serving an online casino is a remote casino operating licence. A company that holds only a remote general betting licence is licensed to take bets, not to run casino games. That mismatch is uncommon among established operators and worth noticing when it appears.
Each licensee also has an account number — a short numeric identifier the Commission uses for the business as a whole, distinct from the longer reference on an individual licence. Great Britain-licensed operators are required to display their licensed status, including that account number and a link through to their entry on the register, on the site itself. It is normally in the footer.
The register, field by field
The Commission's public register is searchable at gamblingcommission.gov.uk. You can look a business up by company name, by trading name, or by account number. An entry gives you, among other things:
The licensee's legal name and registered address. This is the company you would actually be in a contract with. It is frequently not the brand name on the website, and that on its own is completely normal — one company often runs several brands.
Licence status. A licence in force reads as active. Licences can also be surrendered, lapsed, suspended or revoked, and a site still trading under a status that is not active is a serious problem rather than an administrative footnote.
The activities licensed, including whether casino is among them and whether it is held on a remote basis.
Trading names, which is how a brand you recognise connects to a company you have never heard of.
Domain names. The licensee tells the Commission which websites it operates under the licence, and those domains are listed on the entry.
The domain field is the whole ballgame
Here is the check that separates a real verification from a satisfying feeling.
A licence is held by a company. It is not a property of a URL. So "this site is run by a licensed operator" and "this domain is covered" are two different statements, and only the second one is what you are actually relying on when you deposit. The register lists the domains the licensee has declared. If the address in your browser bar is not among them, you have found something worth stopping over — it may be an unlisted mirror, a lookalike, a stale or newly launched property, or a site that has nothing to do with the company whose licence number it is displaying.
Work in that direction, too. Search the register for the operator, read the domain list, and then go to the site — rather than reading a number in a footer and searching for it, which is the order in which a fabricated number has the best chance of surviving.
Two other traps in the same family. Check the spelling of the domain character by character, because near-identical addresses are the oldest trick in the book. And check the top-level domain: an operator's licensed .com is a different address from an unlisted .net wearing the same logo.
Badges are pictures
A "licensed and regulated" roundel, a testing-laboratory seal, a responsible-gambling logo: all of these are image files served from the site you are trying to verify. Copying one takes seconds. Unlicensed sites use them freely, sometimes complete with a plausible-looking licence number belonging to a real and entirely uninvolved company, because the number is far more likely to be read than checked.
The genuine version of a licence display links out to the register entry. But even that is only a starting point, because a link is also just markup — follow it, confirm the address it lands on really is the Commission's own site, and read the entry rather than the anchor text.
Two shortcuts that need no lookup
Some checks are decisive on their own.
Credit cards. Gambling with a credit card has been prohibited in Great Britain since April 2020. If a site aimed at UK players accepts a credit card deposit, it is not operating under a GB licence. This is a two-minute test that requires no register at all.
GAMSTOP. Every operator licensed to offer online gambling to Great Britain must be signed up to the national self-exclusion scheme. That makes "not on GAMSTOP" a straightforward statement that a site is outside the GB licensing regime — which is exactly why sites use it as a selling point aimed at people who have excluded themselves. It is a description of what the site is not covered by, not a feature.
You can also cross-check the licensee's legal name and registered address against the Companies House register if the company is incorporated in the UK, which confirms that the entity named in the terms exists and is filing.
Run the check
Work through the site you are looking at and record what you actually find rather than what you expect. The tool keeps score; it does not know anything about any operator and nothing you enter leaves your browser.
What a verified licence does not tell you
It is a floor, not a rating. A licence confirms that a company is accountable to a regulator with a complaints route and enforcement powers, that its random number generators and paytables are independently tested, that your age is verified before you can play, that customer funds are held under a stated arrangement disclosed in the terms, and that deposit limits and self-exclusion are available.
It does not say the terms attached to a promotion are reasonable, that support answers quickly, or that withdrawals are smooth. Nor does it change the house edge by a single point — a certified 96% game is certified to keep 4% of everything staked. The next two things to read are the terms that void winnings, which is where most disputes actually originate, and withdrawals and verification.
18+. A licence check is a check on the operator, not a safety rating for gambling. Free, confidential support is available on 0808 8020 133.