Sometimes it comes in handy that I've been a regular at the comic store in my city ever since it opened (it'll be 8 years in December, if I remember correctly), and that I even worked there for a bit (as a "security guard", checking that people didn't steal anything on busy Saturday afternoons). For instance, when I go there, buy a lot of manga, and then I don't have enough money to pay for it all. The stack of manga I came home with today is worth around 50 euro, I only had 30. I'll pay the remaining 20 next time I'm at the shop and have enough money. \o/ Luca, the owner, knows I'm a regular and I'm not about to run away and leave the debt unpaid.