Provably Fair Site Reviews

How to read a review on this site

Each page opens with the record: licence and register, the cashier as written, the welcome offer with its wagering multiplier, and the point at which documents become mandatory. Where a figure is not published by the operator, the field is left out rather than filled with an estimate.

What provably fair actually proves

One thing: that the result of a round was fixed before the bet and not altered afterwards. The mechanism is a pair of seeds — one the server commits to as a published hash before play, one the client contributes — combined to produce the outcome. After the round the server reveals its seed and anyone can re-run the hash to confirm it matches the commitment published earlier. What it does not prove is the house edge, the payout schedule, or that the operator will pay a winner.

What these pages check

Whether the verifier exists and runs — a page where seeds can be pasted and checked, not a paragraph claiming fairness. Whether the server seed is published after rotation rather than on request. Whether the client seed can be changed before a round. And whether the house edge of each original game is stated as a number: dice, crash, mines and plinko all have one, and a site that prints it is easier to check than a site that prints a fairness badge.

Not the same thing as a laboratory certificate

Provable fairness covers a site's own games. Third-party slots from outside studios cannot be verified this way; they are tested by laboratories such as eCOGRA, GLI or iTech Labs, and that certificate belongs to the studio rather than to the casino. A lobby with both kinds of game carries both kinds of assurance, and these pages say which applies to what. Verification is also no substitute for a licence: a verifiable dice game on an unlicensed site is a fair game with no regulator above it.

Checking one round yourself, in two minutes

Take a round you have already played, open the game's fairness tab and copy three things out of it: the server seed as revealed, the client seed and the nonce. Paste them into the site's verifier, or into any independent verifier using the same hash function, and compare the result with what the game paid. If the outcome reproduces, that round was honest. If the verifier is missing, if the revealed seed never appears, or if the result does not reproduce, the badge is doing no work at all — and knowing that is worth more than any rating, because it is the one test a player can run alone.