A business letter communicates data exterior the organization and requires a salutation. Casual: Expensive first title and surname Formal: Expensive Mr surname, for a man, or Expensive Ms surname for a girl. If you don’t know the title of the recipient, use Expensive Sir or Madam or Expensive Sir/Madam. H. The main points of the letter are to be added at this point.\n\nA formal ending (if you realize the recipient), use Sincerely or Yours sincerely. A formal ending (if you don’t know the recipient): Yours actually or Yours faithfully. The UK Publish Office recommends that on envelopes the postcode should have a line of its own: -parcels/mailing-guide/clear-addressing.\n\nThis is presumably as a result of most publish is read routinely and it’s easier to establish a postcode on its own than on a line with other data. In letters, I believe it comes all the way down to a matter of non-public desire: some folks write the postcode on the same line as town, some on the line after.\n\nIf the letter has your boss’s title in print at the bottom and is signed by him or her, you needn’t use pp. Levels of formality do change all the time, especially with the usage of e mail and so on, but I’d say ‘thanking you’ is a bit too informal for a business letter.\n\nWhile ‘pp’ was used in traditional business letters, e mail etiquette is mostly more fluid and informal. So I would say that ‘on behalf of’ works nicely, either firstly or end of an e mail, but pp is equally acceptable when you favor to use that. I believe the answer to this is that you could, but you needn’t. Business language has turn into more informal on account of e mail and so forth and so traditional varieties are used less.