Some trademark C&Ds are legitimate; many overreach to scare small businesses. Paste it for a read on how credible it is.
A real, identifiable mark owner or their attorney, the specific registered mark, and the specific use they claim infringes — with verifiable details.
Vague claims, no identifiable mark, demands for money, or threats far beyond what trademark law allows. Verify the mark and sender before reacting.
If it's credible and specific, yes — ideally via an attorney. If it's a vague bluff from an unverifiable sender, verify first. Paste it above to gauge it.