San Marino gets so few foreign visitors that Angela and I made it a priority to find both a postcard and a stamp during this visit to be sure Wanda received correspondence from this tiny country.
As it turns out, we need not have fretted over it like we did through the Balkan states. Apparently most visitors want to chronicle their trip to San Marino with a postcard home, as we found that postcards, stamps, and post boxes were in plentiful supply. The stamps even included a QR code so we could track the delivery process.
San Marino postal services for the win!