How To Write A Letter To Prince Harry . A pic of prince harry and markle at their first official photo call with archie came with a printed note on the back: Your project arrives fully formatted and ready to submit. Anthony F. Fiorentino, author of "Breaking The Ice" and "Loving Nature from rp-author.com We print your letter for you we print your message on real paper, put it in an enveloppe and we. Tensions still remain, but prince harry has made a start on healing his rift with the family (getty) the duke of sussex wrote his father a ‘deeply personal’ letter ahead of. When writing to the queen, tradition dictates you should open with ‘madam’, and close the letter with ‘i have the honour to be, madam, your majesty’s humble and obedient servant’.