Is It Illegal?

   Give your "girlfriend" a gun to blow up instead of talking hot and cold. Why do you attach your mind to it?

   Don't worry, nothing can happen, and someone needs to give a signal to move the system, ie. don't tell him left and right so that a bad classmate doesn't ring in social media. Otherwise, address registration in the municipality is very quick and easy, you go with your aunt or uncle and they tell you that you live and they write down your names. And with a power of attorney from your parents, you can live wherever you want. In your case, you are almost 17 years old, even if someone goes to deal with such stupidity, everything is so slow that when you are called somewhere, you will be 18. Calmly do not think so, you will not have problems. :)

   By law, you must change your address registration within 30 days of changing your place of residence. Once you are registered in the book of the block, then there is a document certifying that you live there, so it is good to change your registration. Go to the local municipality and ask what exactly you need to do. He also talks to his uncle because he owns the property. It will take a few hours, but yes, everyone will be calm. Personal advice: I know how bad it is for your parents to be in some financial difficulty. If possible, look for a job. Waiters, sellers and the like are always in demand. Contrary to popular belief, after the age of 16, no parental permission is required to work. It's a little harder, but if you have 2-3 shifts a week, you will be able to get a few hundred levs, which in your situation,

   Oh, mom's girl who lives with her parents :), and why don't you live alone?

   Tell your girlfriend to change the variety of mushrooms she eats. If you plan to stay with them longer, tell your aunt and uncle that an unscrupulous neighbor can make a problem for you if you file a complaint. The laws in Bulgaria are so ridiculous that they only peel the skin of the common people. So you catch the owner of the apartment with the notary deed in hand and you both go to the municipality. There you will be given to fill in an address registration form. In a week you go to pick it up and from there to the district. You fill in the form again with the other one in hand which is given to you by the municipality and your ID card. They take pictures of you, take your fee and in a month you go to get your new ID card and hand over the old one. There were some small fines of about BGN 20 in case of loss, expired term or as in your case. But believe me, you don't have a job with a police officer, laws and prosecutors. They always peel a little of the rest of the skin. No one can push your niece or anything more than one act if someone is found to file a complaint. Or they stop to check, you will have to explain why you are not in the village.

   You live there with the consent of your parents. You are registered at the appropriate address, and your little cousin lives with her parents, so there is nothing illegal. It would be illegal if she ran away from you and your parents didn't know where you were, but if you're with relatives with their consent, there's nothing illegal. It is as if a child lives with his grandparents because his parents are abroad, it is illegal. Well, no, of course not. It is there with their consent and knowledge. And if your aunt pays for you whatever fees are collected at the entrance, for an elevator cleaner, etc., no one can fine you. You have absolutely no reason to worry!

   You are making a temporary registration. With temporary registration it is not necessary to change an ID card.