Which is The Appropriate Term to Utilize Yours Truly? Or Yours Faithfully?

Yours sincerely is actually a traditional sign off you write when you are writing to someone who holds close relation to you and is used in emails or letters it is used when you are writing to someone whom you have interacted with before and is not a total stranger.

Yours faithfully is used when you are writing to someone with whom you have not interacted before it is used more in formal writings specially if you have greeted them with “Dear sir or Madam”.