Whenever it's polite to do so! You send a formal thank you note when someone does something especially nice for you, or when you have received a formal gift or favor, or whenever you would say "thank you" in person.
No, but it is proper etiquette to send a thank you note to those who gave you a gift.
It's not necessary, but it's a nice touch to thank people for supporting you when you were in hospital ill. If you had a baby in hospital then you don't need to send thank you notes.
If you are talking about a person that has interviewed you for a job it is not necessary to send them a thank you note and most people do not.
No, it is not necessary to send a Thank You Card for a a funeral mass card.
No, guests that attend a wedding do not send thank you notes and it's the bride and groom that will send thank you notes to their guests for attending and also thank them for the gift.
No, the maid of honor or bridesmaids do not have to send a note of thannks to parents of the bride.
Send a thank you note.
Just send a Thank you card.
It is only polite to send a thank-you note to anyone who has taken the time to interview or consider you for a job. It also marks you as a professional and a mature worker.
Send flowers and a note after a performance.
Send a thank you note.
you dont have to but its nice