Law / Bus ticket fine in Poland (Warsaw) - what if I don't pay the fine? [36]

Hello!

I've recently decided to visit Warsaw for my vacations, and of course i rode a bus, unfortunately though during my drive an inspector decided to show up, and also unfortunately for me i didn't had a ticket since i didn't know where to buy one and i didn't had my credit card with me to buy one from the machines which for some strange reason they only accept credit cards which i was not carrying with me, he then dragged me out and asked me for my ID card which i provided him with my passport, he wrote my last name wrong but everything else was right like passport number and my first name, he only filled those he gave me my fine and then i left.

What happens if i decide not to pay for that ticket since i will be leaving the countries in a few days and i do not want to get into the trouble of converting euro to zlotty yada yada yada

Thanks!