Your mail passport fills in automatically. When a 1:1 swap completes, or a circle envelope is marked received, we stamp the country you mailed. Profiles also show a Mail desk: envelope count, countries, continents, and earned stamps (first envelope, 10 letters, five countries, three continents, a 3-month streak). These are real-mail badges, not a shop. Other members see the countries and the display names of people you’ve mailed — never street addresses.
Mail passport
Finished swaps stamp the countries you’ve mailed — a little collection to show off.