Privacy tools attract convincing copies. There is exactly one address for this one.
solmix.org (and www.solmix.org, which redirects there). No other domain, subdomain or mirror runs this service..org on the end. A hyphen, a doubled letter or a different suffix is a different site owned by somebody else.The copy is not a bad copy. It is this page, duplicated, which is why looking carefully at the design tells you nothing. The change is in one of two places, and both are invisible from the front:
In neither case is there a moment where something looks wrong. You find out later, and there is no recovering it — not by us, not by anyone, because nobody has custody of anything in this design.
Paid search results sitting above the real one. Replies under posts about mixing. "Support" accounts that appear in your mentions shortly after you ask a public question. Group chats where a helpful stranger pastes a link. Every one of these is cheap to run and all of them work, which is why they keep happening.
SolMix has no support channel, no staff who contact users, and no reason to ever need anything from you. So treat all of the following as an attack with no exceptions: a message that arrives first; a request for your note "to check the status"; anyone asking for a seed phrase or private key; an instruction to prove a wallet works by sending it something. There is no legitimate version of any of them.