Remember the last time you got a real letter in the mail? Not a bill, coupon, or invitation. And, not even a thank-you note. An actual letter, written by hand, just for you? There’s something almost ...

Business Insider asked etiquette experts when it's appropriate to send a handwritten thank-you note. They said a note is essential after staying at someone's home or receiving a personalized gift.

Writing thank you notes might be one job plenty of people would be willing to let AI and robots take over. Turns out, they already are. The company Handwrytten deploys artificial intelligence to help ...