Sigunature? Right.

Here's pretty awkward Japanese thing.
The other day, a banker came in and asked me to sign on the paper which does do with my account changes or something. So I did. And he looked at it and was like "Oh, I meant your FULL NAME in KANJI." I was like What the hell? You said and even paper says "signature here." Why don't you just say so in the first place then?