Dear Mr Lord Porch,
Thank you for your reply and for taking the trouble to send me a copy of your passport, I am reassured that you are indeed who you say you are and that you have a valid reason for living in Liverpool.
However, when I return to the Post Office I know what Mr McDonald will ask me. He will ask “but how do you know he is a diplomat and has anything to do with UK Customs?” So to pre-empt that question please can you send me a copy of your employment security badge.
Receipt of the above will put my mind entirely at rest and also stop Mr McDonald from asking any more awkward questions.
Ethel Trellis (Mrs)