The one fact a scam site can't fake
Almost everything a casino shows you is under its own control. The design, the testimonials, the trust badges, the licence number printed in the footer — all of it is content the operator types into its own pages. A rogue site can copy any of it in an afternoon, and many do.
The Gambling Commission public register is different. It's a third-party record the operator does not host, cannot edit, and cannot fabricate. Either a company holds an active licence on that register or it doesn't, and either a specific domain is listed against that licence or it isn't. That makes the register the only check on this entire site that a scam cannot defeat by lying on its own website.
This is why the licence check sits ahead of every other safety check we describe in the five-checks guide. Sane bonus terms, early verification, a named dispute scheme and a clean complaint history all matter — but they only matter once you've confirmed the operator is who and what it claims to be. Run this check first.