While working for a security base, I received a call from a VIP from another base asking whom to address an important letter.  Being aware that my last name would be tough for him to spell, I told him to put my first name as my surname was too hard.

The next day I received a letter for me addressed as Major M. TooHard.   

(Note: Major M is serving personnel and hence doesn’t wish to disclose name and further details)