Passport.

At the Portland Airport the Lufthansa check-in guy asked us to sign our passports. He said we might be arrested upon arriving in Germany if we didn't sign them. As we were in a rush to get onto the plane, we weren't paying very much attention to anything going on around us. He handed us our passports and we signed them. It turned out he handed us the wrong passports. For the next ten years my passport will be signed "Lynnsy Corrorubia." They didn't seem to notice when we arrived in Germany but it might present a problem sometime down the line.