@jerry same problem here. I have several doppelgängers in Canada apparently. Sensitive real estate documents get mailed my way. If it looks legally binding or filled with PII, I try to reach out to the emailer and let them know. Often I get radio silence but a few times I’ve had a heartfelt thank you for identifying the problem. That makes it worth it for being a good human.
HOWEVER, usually I mark them as spam because I get suspicious if it’s done on purpose to create some kind of engagement, trust, or to identify active accounts.