This is a scam. The website mentioned is not the official trademark office's site. The legitimate one ends in .gov. The letter I received was from a suspicious URL. Always access the official website directly instead of clicking links in emails. Be cautious of sites with hyphens or odd formats, as they often lead to different sites. They may seem to have detailed information about your trademark, but it's likely just public information. I confirmed my trademark doesn't require renewal yet, thanks to my company's recent security training.
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