- Sincerely yours
Best or Best Wishes Casual or Business casual. A polite way to end the letter. Can be used between friends or strangers.
Sincerely or Sincerely Yours or Yours Sincerely Casual, Business casual or Formal. The standard letter ending. ‘Sincerely’ is the most versatile ending because it can be used to end either casual or formal correspondence. If you’re unsure about how to sign your letter, use ‘Sincerely’
Regards or Best Regards Business casual or formal. You would use this if the recipient is someone you haven’t met in real life.
Cordially Formal. Used in business correspondence when the topic of the letter is serious. Sometimes used if there is a conflict between the sender and the recipient.
Using an ending that is too casual for the situation may not always be inappropriate. Conversely, using a casual ending can show your self-confidence. But to do this requires you to gauge whether the recipient would like a more casual conversation.