I was in Vlas for 6 months last year and needed to the 5 year card thingy. Had to go to bourgas, get the document to fill in by a translator, go back and hand it in with proof of account, health insurance (E111?) pasport. They took copies of what they needed and told me to com back in a few hours. Went back a few hours later, paid 7 lev for the 5 year card.
Only question asked was that i only had 200 levs in my account, so i had to show them my UK bank card.
Funny thing though is that they didn't even ask for the damn thing when I was leaving Varna airport.!!