How do I add my passport number?   Once you receive your passport in the post you will find the passport number at the bottom of page 2, look out for the letter from the Mayors office, it’s close to that.   Then on the Dunedin Difference website log in with your user name and password that you created when you first registered and click on GO.   At the next screen you will see a button to + add your passport number or click through the following links: My account > Edit > Member details