Casino basics
Casino Sister Sites UK: How to Tell Which Brands Share an Owner, and Why It Matters
Last updated: 2 August 2026 | Reviewed by: Tom Ashby — 11 years covering UK iGaming (about the team). Methodology: We treat ownership as a claim requiring a register entry, not an inference. Where we can only observe a pattern, we label it a signal. Methodology · Editorial policy.
Affiliate disclosure: GambleDragon earns commission when a reader signs up via a tracked Britsino link. This page makes no recommendation and ranks nothing; it explains a structure. How we make money.
Quick answer
A “sister site” is not a technical term. It describes two or more gambling brands that sit behind the same operating licence, the same corporate group, or the same platform supplier — often all three. From the outside they look like competitors. From the inside they frequently share terms, bonus rules, account restrictions and a games catalogue.
The reason to care is narrow and practical: rules that read as per-site are usually enforced per-group. One welcome bonus per household commonly means one across the whole family of brands, not one each. A bonus-abuse flag on one account can close the others. And a self-exclusion at operator level binds the licensee, which means every brand that licensee runs.
Search interest is modest but growing and, unusually, almost uncontested: “casino sister sites” runs at a median of 355 searches per month in the UK with growth of about 41% comparing the three most recent months against the three oldest, and scores 0 out of 100 on keyword difficulty (GambleDragon analysis of UK keyword data, 1 August 2026). When we pulled the live results for that query on the same date, two of the top ten were business-to-business industry publications rather than anything aimed at a player. That is a topic nobody has written properly for the person actually asking.
The only authoritative way to check
The Gambling Commission’s public register lists licensees and the trading names each licensee operates. That is the primary source, and it is the only one we treat as proof.
How to use it:
- Find the licensee, not the brand. Scroll to the footer of the casino. UK licensees must display the licensed company name and licence number. That company, not the brand, is the entity to search.
- Look at the trading names attached to that licence. A single licensee can run many. Those are, by definition, sister sites.
- Check the licence status and the activities it covers. A licence can be surrendered, lapsed or subject to conditions, and it may cover some activities and not others.
Everything else — “same design”, “same welcome offer”, “same support script” — is circumstantial. It can be strong circumstantial evidence, which is the next section, but it is not a register entry and we do not publish it as one.
Signals you can verify yourself
Ownership claims are often published without evidence. These signals are things you can check without trusting anyone, including us. Each is a reason to look at the register, not a substitute for it.
- An identical payment stack. Independent operators converge on the popular rails, but rarely on the exact same set in the exact same order.
- An identical studio line-up. Games are licensed through aggregators, so a shared catalogue usually means a shared platform supplier.
- Category counts that match too closely. If two lobbies report near-identical numbers of live tables, roulette and blackjack titles, they are almost certainly reading the same catalogue. Our German desk found exactly this pattern in a full lobby capture on 29 July 2026: two brands where all 9,287 unique game names of one were contained in the other, with blackjack counts identical at 53 in both.
- Shared terms wording. Copy the most unusual sentence from the bonus terms into a search engine in quotes. Boilerplate travels within a group.
- A shared support or complaints address. Frequently the fastest tell of all, and it appears in the privacy policy rather than the footer.
What our own index shows
We can demonstrate the payment-stack signal on data we hold rather than on assertion. Among the Curaçao-licensed brands in the GambleDragon operator index, fourteen list exactly the same six methods in the same order — Visa, Mastercard, Skrill, Neteller, Bitcoin, Ethereum — while two others list the same six plus Litecoin:
| Signal group | Brands in our index | Payment stack | Licence | Min deposit |
|---|---|---|---|---|
| Identical six-method stack | Betportal, Betride, DonBet, Fabulous Vegas, Megaways VIP, Patrick Spins, Rolletto, Rollino, Smash, VegasHero, Velobet, Winzter, Zizobet, Casperbets | Visa, Mastercard, Skrill, Neteller, Bitcoin, Ethereum | Curaçao GCB | £20, except VegasHero at £10 and Casperbets at €10 |
| Same stack plus Litecoin | Goldenbet, SpinShark | above, plus Litecoin | Curaçao GCB | £20 |
| UKGC licensees, distinct stacks | Britsino ★, Cosmobet, BetVictor, NetBet, Mr Green, Highbet | 4 to 7 methods, no two identical | UKGC | £10 |
★ = GambleDragon’s featured commercial partner. GambleDragon operator index, 2 August 2026.
What this table does and does not say. It says sixteen brands in our index present an identical or near-identical payments configuration, which is a strong indicator of a shared platform. It does not say they share an owner: we have not verified corporate ownership for any of them, and their licence numbers are marked pending verification on their own pages. We publish the observation and withhold the conclusion, which is the correct order.
It also carries a warning that has nothing to do with ownership. All sixteen are Curaçao-licensed and therefore outside GAMSTOP. If you have self-excluded, do not deposit at any of them; see GAMSTOP explained.
By contrast, the UKGC licensees in our index have visibly different payment configurations — Britsino at seven methods, Highbet at four, no two identical. That is what an unrelated set tends to look like.
Why it matters to you, in order of how much money is at stake
1. Bonus eligibility is usually per-group. “One welcome offer per person, household or IP address” is standard wording, and the enforcement is at licensee level. Claiming the same offer at three sister brands is the single most common way players find bonus winnings voided, and the operator is within its published terms when it does so.
2. A restriction can travel. If one account is closed for breaching bonus terms, the group’s fraud systems can and often do apply the outcome to the rest. People discover this when a second account is closed for a reason they thought belonged to the first.
3. Verification is shared, and that cuts both ways. Documents already accepted by the group can speed up a second brand’s checks. It also means source-of-funds questions asked at one brand are informed by activity at another.
4. Self-exclusion binds the licensee. Under the Commission’s licence conditions a self-excluded person’s accounts must be closed and funds returned, and their details removed from marketing databases within two days. That obligation sits on the licensee, so it covers the brands that licensee runs. This is the one place where sister-site structure works in the player’s favour, and it is a reason to self-exclude at operator level as well as through GAMSTOP.
5. Diversifying across sister sites does not diversify risk. If the reason for spreading accounts is payout reliability or dispute handling, brands on one platform give you one platform’s behaviour under three logos.
What sister sites are not
- They are not clones or copycat domains. A sister site is a legitimate second brand of a real licensee. A copycat is an unrelated third party using someone else’s brand name in a domain. Those are different problems with different remedies, and the second is far more common in search results than most readers assume.
- They are not automatically a bad thing. Multi-brand operation is normal, legal and often just segmentation — a bingo-led brand and a slots-led brand serving different audiences from one back office.
- They are not evidence of anything by themselves. The interesting question is never “are these related”, it is “does the relationship change a term I am about to agree to”.
Frequently asked questions
What is a casino sister site?
Two or more gambling brands that share an operating licence, a corporate group or a platform supplier, and usually more than one of those. They typically share terms and conditions, a games catalogue and back-office systems, while presenting as separate businesses. The relationship matters mainly because rules that read as per-site — bonus eligibility, account restrictions, self-exclusion — are commonly enforced per-licensee.
How do I find out if two casinos are sister sites?
Take the licensed company name from each site’s footer and look it up on the Gambling Commission’s public register, which lists the trading names attached to each licence. If both brands appear under one licensee, they are sister sites. Anything short of a register entry — matching design, identical bonus wording, the same payment methods — is a signal worth checking, not proof.
Can I claim the welcome bonus at every sister site?
Almost never, and attempting it is the most common route to voided winnings. Standard UK bonus terms restrict the offer to one per person, household or IP address, and the restriction is enforced at licensee level rather than brand level. Read the eligibility clause before claiming a second offer within a group; operators enforce it after the wagering, not before.
Does self-exclusion apply across sister sites?
At operator level, yes. The Commission’s licence conditions require a licensee to close the accounts of a self-excluded customer, return any funds held and remove their details from marketing databases within two days of notification, and that obligation attaches to the licensee rather than to a single brand. GAMSTOP goes further by covering every operator licensed in Great Britain from a single registration.
Are sister sites a warning sign?
Not in themselves. Running several brands from one licence is normal, legal and usually a segmentation decision. What is worth checking is whether the shared structure changes something you are relying on — whether a bonus you plan to claim is already spent within the group, and whether the payout behaviour you liked at one brand is actually a property of the platform rather than the brand.
Why can I not find ownership information for some brands?
Because it is not always published, and because a great deal of what circulates online is asserted rather than sourced. Where a brand’s licence number is unverified, no honest ownership claim can be made about it. Our own index contains sixteen Curaçao-licensed brands with an identical payments configuration; we publish that observation as a platform signal and specifically do not present it as shared ownership, because we have not verified it on a register.
Sources
- Gambling Commission: public register — licensees, trading names, licence status and activities. The authoritative source for any ownership claim.
- Gambling Commission: LCCP social responsibility code provision 3.5.3, remote self-exclusion — account closure, return of funds, removal from marketing databases within two days.
- GambleDragon operator index, 2 August 2026 — payment stacks, licences and minimum deposits for the brands tabled above.
- GambleDragon DACH desk, full mobile lobby capture of five German-facing brands, 29 July 2026 — the identical-catalogue finding cited as a platform signal; published in full in Casino-Apps in Deutschland.
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