When writing a business letter, there are a number of different endings that you can use. However we suggest that you use either "Yours Faithfully" or "Yours Sincerely".
When you know the name of the person you are writing to then use "Yours Sincerely".
When you don’t know the name of the person you are writing to the you use "Yours Faithfully".
Dear Mr. Smith,
Please find attached …..
Yours Sincerely
Dear Sirs,
Please find attached ….
Yours Faithfully
Yours Faithfully
Dave @ SLS