An attorney case closing letter, also known as a termination of representation, is a formal document that officially ends their representation of a client in a matter.
One of the teaching points is to end correspondence with “Yours sincerely” or a similar phrase when writing to someone by name. “Yours sincerely”, “Sincerely yours” and “Sincerely” are all possible. “Yours sincerely” is the most common. “Sincerely” is one often used by lawyers.
All of those are acceptable in either a formal or an informal context, though “Best regards” would be the most appropriate to use in a formal context. “Yours truly” is the classic closing for letters, which is sometimes used in emails, though not as often.
End a letter with a respectful word or short phrase that signs off your message and signals your letter is complete. Common ways to end a letter include “Sincerely,” “Respectfully,” “Regards,” “Best,” and “Appreciatively.” Effective formal letter closings are polite, professional, and clear.
“Sincerely” is one often used by lawyers. When writing to someone without referring to them by name (e.g. “Dear Sir or Madam”), the convention in the US is to sign off with “Yours truly” (or something similar) and the convention in the UK is to sign off with “Yours faithfully” (or something similar).
Sincerely (or sincerely yours) is often the go-to sign off for formal letters, and with good reason.