When someone does something kind for you, expressing gratitude is essential — and sometimes, a physical thank-you note can be more impactful than words alone. Handwritten thank-you notes are a ...

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.

Sending a thank-you note can help you stand out, as few people do it, said recruiter Laura Lazewski. Expressing appreciation is also a way to correct missteps and show you're resourceful, she said. A ...