Fixed Odds Betting Terminals, or FOBTs, have sparked plenty of questions. Players want to know if the results are fair, what the Return to Player (RTP) figures really mean, and whether anyone can influence outcomes.
This article explains how FOBTs operate, what safeguards are in place, and how to spot genuine faults. Read on for clear, practical information that strips away confusion and helps you decide what to do next.
Keen to get straight to the facts? We begin by looking under the hood at how these machines actually work.
How Do FOBT Machines Actually Work?
FOBTs are computer terminals found in betting shops. The visible touchscreen, buttons and graphics are an interface, but the result of each play is produced by software. That software contains a Random Number Generator (RNG) which determines outcomes independently for every round.
The RNG is engineered to produce unpredictable results and each play is resolved instantly by the machine’s code. Outcomes are not set by staff or influenced by shop conditions; the software outputs the result at the moment the play is made. Before any machine reaches the shop floor it must pass technical tests to confirm the RNG behaves as intended.
Those tests, and the machine’s approved configuration, are overseen by the regulator. With that in place, the next question most players ask is what those technical settings mean for returns — which brings us to RTP.
Understanding RTP: What Players Need to Know
RTP, or Return to Player, is the long-term average percentage of stakes a game will pay back. For example, an RTP of 95% means that over a very large number of plays the game returns about £95 for every £100 staked. This is a statistical measure built into the game software and fixed unless formally changed and re-tested.
RTP is not a promise for any single session; short-term results can vary widely from the long-term average. It is displayed so players can see how a game is configured, and it is subject to independent checks as part of regulatory approval. Keep realistic expectations about variance in any single visit, and focus on understanding the numbers rather than expecting a particular outcome on any one play.
With RTP and RNG explained, the natural follow-up is whether those outputs are genuinely random — and how that randomness is confirmed.
Are Outcomes on FOBT Machines Truly Random?
RNGs on approved FOBTs are tested by independent laboratories to ensure they meet industry standards for unpredictability and lack of bias. Testing looks at whether outputs follow the statistical patterns expected of a properly functioning RNG and whether any implementation errors could affect results.
Once a game meets those tests it is certified for use. Ongoing audits and version controls ensure the same standards remain in place after installation. Because of this process, outcomes are treated as independent events of the machine’s software rather than the result of any external influence. If the concept of certification raises questions about who checks machines and how often, the next section explains the regulatory framework that enforces those standards.
How Do FOBT Machines Ensure Fair Play?
Fairness is enforced through a combination of legal requirements, technical testing and ongoing oversight. Detailed documentation about a game’s operation must be available for regulatory review, and independent testing bodies verify that the software produces outcomes consistent with its specification.
Regulators require operators to log changes and to run audits so machines remain in the same state that was approved. If testing reveals deviations, the machine can be barred from use until the issue is resolved and re-certified. These safeguards create a reliable chain from development to deployment, which supports fair operation on every machine.
Having established who checks the machines and how, it’s worth addressing a common question: can operators or shops actually alter payouts once a machine is in use?
Can Casinos or Bookmakers Adjust FOBT Payouts?
No. Payout settings and prize structures are set by the game developer and approved before the machine is offered to the public. Any change to those settings requires further independent testing and regulatory approval before it can be applied.
Operators do not have a backdoor to alter odds or trigger wins on individual machines. Changes are visible in audit logs and must pass compliance checks. That separation between operators and the game configuration helps maintain consistent play for everyone and reduces the opportunity for manipulation. With that clarity, many persistent stories about timing or shop staff control fall into the next category of myths.
Myths & Misconceptions About FOBT Machines
Several misconceptions persist. One is that machines “tighten” or “loosen” their payouts based on recent results. Because each play is generated independently by the RNG and because RTP is a long-term measure, short-term patterns do not indicate any deliberate change in odds.
Another myth is that staff can secretly control outcomes or that playing at particular times affects chances. The technical controls, certification and audit trails make such interference infeasible on authorised machines. Where problems are real, they tend to be technical faults rather than intentional unfairness.
If concerns persist, the sensible response is to look for signs of a fault — a different topic that follows naturally from myth-busting and helps you know what to watch for.
Signs of Unfair or Faulty Machines
True faults show up as technical errors. Examples include incorrect balance displays, wins not being credited properly, unresponsive touchscreens, repeated crashes or missing game information such as the stated RTP or rules. These are operational issues rather than evidence of a change in game mechanics.
If a machine behaves erratically, stop using it and report the problem. Staff can suspend the machine for inspection and prevent further play until it is checked. Clear faults are handled through the operator’s maintenance and reporting processes, and may lead to formal testing if necessary. Knowing how to report a problem smoothly helps ensure the issue is resolved quickly, which is the next topic.
Reporting the Problem
Start by telling a member of staff exactly what happened, including the time and the nature of the fault. Staff can take the machine out of service and record the incident. If the operator’s customer service process does not resolve the issue, there are further routes: contacting the regulator or using an Alternative Dispute Resolution provider for unresolved complaints.
Support organisations and tools are also available if you need advice while the issue is being investigated. They can help with options like self-exclusion and other measures designed to protect players. Reporting problems promptly and using the available routes ensures concerns are investigated and that play remains fair for everyone.
This explained how FOBTs operate, how RTP and RNGs work, the safeguards that protect players, and what to do if a machine shows faults — leaving you better equipped to recognise fair play and act if something goes wrong.
**The information provided in this blog is intended for educational purposes and should not be construed as betting advice or a guarantee of success. Always gamble responsibly.