if its a local bank in dubai, i think there would be no problem... because they dont have any branch here in qatar.. and i think they will not chase u, unless otherwise somebody would report you to them that you're here..tell your brother to be good here... alot of people does that, get a loan here and go to another country, sometimes they go back to their native country.. i know someone who got a very very big loan from 3 banks, he went home and never came back.. it would be a lifetime ban,, but dont worry, you are in another country, they can not reach you here... but if the bank is a international bank, then it may be different scenario.