I swear the people at the post office must think I'm an idiot. Every time I go, it's to send money home or do some sort of official thing. Every time, I forget something. There's so much bureaucracy involved with this stuff that you need like 17 forms of ID, a blood sample, promise to give your firstborn ... that kind of thing. I always forget one of these things, usually either my hanko (really simple and thus easy-to-forge hand stamp which takes the place of signatures in Japan) or my account book. When you do this stuff at home, you obviously don't need the hanko, and I certainly never needed anything other than ID and knowledge of my bank account to do almost any banking.
The result is that I look like a clueless idiot every time I go.