- Account number
- The reference under which an operator appears on the Gambling Commission's public register. It is printed in the footer of every licensed casino site and is the quickest way to confirm a licence.
- Alternative dispute resolution
- An independent service that rules on complaints a casino has failed to resolve within eight weeks. It is free to the customer, and the casino must tell you which service it uses.
- App
- A casino's program for phones and tablets, downloaded from an official store.
- Authentication
- Proving it is you when logging in, by password, code or fingerprint.
- Balance
- The money in your casino account, split into cash and any bonus.
- Banker
- In baccarat, the hand with the lowest house edge.
- Bet limit
- The lowest and highest stake a game allows.
- Bonus
- Extra credit or spins given by a casino under stated terms.
- Cashier
- The page where you deposit and withdraw. It lists the accepted payment methods, their limits and any pending withdrawals.
- Chat support
- Live text help from the casino's staff.
- Complaint
- A formal expression of dissatisfaction a casino must log and answer.
- Cooling-off
- The wait before a raised limit takes effect.
- Customer funds
- The money players hold in their accounts. Operators must keep it separate from company money and state how well it is protected if the business fails.
- Dealer
- The person running a live table.
- Debit card
- A bank card paying from your own account; accepted everywhere.
- Demo
- A free version of a game played with pretend credits. In Britain it is available only after age verification.
- Deposit
- Money you pay in.
- Deposit limit
- A cap you choose on what you can pay in over a day, week or month. Lowering it is immediate; raising it takes a cooling-off period.
- Developer
- The studio that makes a game.
- Dormant account
- One left unused for a long time; fees may apply.
- E-wallet
- An online payment account such as PayPal, Skrill or Neteller. Quick for withdrawals, but often excluded from welcome offers.
- Encryption
- The scrambling of data between your device and the casino.
- Exclusive game
- A title available only at one casino or group.
- Fairness testing
- Independent checking of a game's randomness and return.
- Game show
- A hosted live game built around a wheel or board.
- GAMSTOP
- The free national self-exclusion scheme. One registration blocks you from every online gambling site licensed in Great Britain for six months, one year or five years.
- House edge
- The casino's average advantage on a game: about half a percent on well-played blackjack, 2.70% on single-zero roulette and about 4% on slots.
- Identity check
- Verification of your name, age and address.
- Instant bank payment
- A transfer you approve inside your own banking app that reaches the casino in seconds, and often pays withdrawals just as quickly.
- Jackpot
- A top prize far larger than a game's ordinary wins. Fixed jackpots pay a set amount; progressive ones grow with every bet.
- Licence
- Official permission from the Gambling Commission to offer gambling to people in Great Britain. A licensed casino site must verify customers, use tested games, protect funds to a stated level and offer safer gambling tools.
- Live casino
- Table games dealt by real people in studios and streamed to you. The tables come from specialist suppliers, so many sites share them.
- Lobby
- The casino's menu of games. A good lobby has search, filters by studio and feature, and shows new and popular titles clearly.
- Loss limit
- A cap on how much you can lose in a period.
- Minimum deposit
- The smallest amount the cashier will accept: £5 at Coral and Ladbrokes, £10 at the other three sites here.
- Minimum withdrawal
- The smallest amount you can take out.
- Mobile site
- The casino as it appears in a phone's browser.
- Net position
- Your running total of wins minus stakes in a session. UK slots must display it so you can see at a glance how you stand.
- Operator
- The licensed company behind a casino brand. Its name and account number appear in the site's footer and on the public register; brands sharing an operator are sister sites.
- Payment method
- How money moves: card, wallet or bank.
- Payout
- Money paid to you; also a game's return.
- Pending period
- The time a withdrawal request waits for the casino's approval. During it the request can sometimes be reversed, which is best avoided.
- Progressive
- A jackpot that grows with each bet.
- Provider
- Another word for developer or studio.
- Public register
- The Gambling Commission's searchable online list of every licensed operator, showing its licences and the website addresses they cover.
- Random number generator
- The certified software that decides each result at the instant you press the button. It has no memory, so no game is ever due to pay.
- Reality check
- A pop-up reminder of how long you have been playing, which you can set to appear at intervals of your choosing.
- Return to player
- The percentage of all stakes a game pays back over millions of plays, shown in its help screen. A 96% slot keeps 4p in the pound on average.
- Reverse withdrawal
- Cancelling a pending payout so the money returns to your balance. It is the commonest way winnings are played back and lost.
- Segregation
- Keeping customer funds separate from company funds.
- Self-exclusion
- A block on your own access for at least six months that cannot be lifted early. GAMSTOP applies it to every licensed site at once.
- Session
- One continuous period of play.
- Sister site
- A casino run by the same operator as another, such as Coral and Ladbrokes. They share platforms and often restrict welcome offers across the group.
- Slot
- A reel-based game of chance.
- Source of funds
- Evidence such as payslips or bank statements showing where your gambling money comes from, requested when spending is high.
- Sportsbook
- The part of a site where you bet on sport. Four of the five here have one on the same account as the casino.
- Stake
- The amount risked on one spin or hand.
- Studio
- Where live games are filmed; also a game maker.
- Table game
- Roulette, blackjack, baccarat and similar.
- Time-out
- A voluntary break from one casino lasting from 24 hours to six weeks, after which the account reopens automatically.
- Two-factor authentication
- A second step at login, usually a code sent by text or app, that protects your account if your password is stolen.
- Verification
- Confirming your name, age and address before you can play. Usually automatic; otherwise by uploading ID.
- Volatility
- How unevenly a game pays: low means frequent small wins, high means rare large ones.
- Wagering
- The amount you must stake before a bonus becomes withdrawable cash. Capped in Britain at ten times the bonus.
- Wallet
- Your account balance, shared across products at some sites.
- Welcome offer
- A bonus for new customers on a first deposit. In Britain wagering on it cannot exceed ten times the bonus.
- Withdrawal
- Taking money out of your casino account. It is approved by the casino, then paid through the same method you deposited with where possible.