My UK passport doesn't list a title, but often when I go through passport control, the officer will say something like 'Thank you Doctor' or 'Have a good day doc'. How do they know I have a PhD? I'd also like to know what other information they see.

closed as too broad by Giorgio, gmauch, Newton, David Richerby, Willeke Aug 7 '18 at 19:38

Please edit the question to limit it to a specific problem with enough detail to identify an adequate answer. Avoid asking multiple distinct questions at once. See the How to Ask page for help clarifying this question. If this question can be reworded to fit the rules in the help center, please edit the question.

  • 1
    What title do you have on your driving licence? – MJeffryes Jul 26 '18 at 17:20
  • What country is this? Doctor is a courtesy title in some parts of the world. – mdewey Jul 26 '18 at 17:23
  • This has happened in Spain, Switzerland, and the UK – dothyphendot Jul 26 '18 at 17:29
  • 2
    My driving license says Dr – dothyphendot Jul 26 '18 at 17:29
  • 15
    Are you wearing a white coat and a stethoscope when you go through passport control? – Sneftel Jul 27 '18 at 6:40