Question

the conventional way of signaling the polite end of a letter is called​

Answer 1

Answer:

Regards, Sincerely, Best

The complimentary close is the word (such as "Sincerely") or phrase ("Best wishes") that conventionally appears before the sender's signature or name at the end of a letter, email, or similar text. Also called a complimentary closing, close, valediction, or signoff.