If you begin a letter with Dear Sir/Madam, or To whom it may concern, then it should be signed off with Yours faithfully.
Everything else i.e Dear Alan, or Dear Mr Jones, should be signed off with Yours sincerely.
If you begin a letter with Dear Sir/Madam, or To whom it may concern, then it should be signed off with Yours faithfully.
Everything else i.e Dear Alan, or Dear Mr Jones, should be signed off with Yours sincerely.