> within 3 days Well that's a scam. If they're going to sue you, let them. You literally have prior use of the term and if you have to prove that, you can wit

> within 3 days Well that's a scam. If they're going to sue you, let them. You literally have prior use of the term and if you have to prove that, you can with comical ease. They know this… which is why this sounds like bullies trying to scare you into giving up a domain they can't afford to pay for. Scary letters are cheap. Write one back asking they reassign their trademark to you? But seriously, probably get paid advice first, and don't worry about this 3 day nonsense. Nobody works that fast. And remember that trademarks are classed. Rarely does somebody get exclusive use of a name in all senses. You might not be able to sell what they sell under their trademark, but they don't have rights to the word in generic senses. Oh and probably approach a regulatory body about their solicitors. This isn't an appropriate way to conduct business.