I want to put an passionate plea here, to stop other people being ripped off. I got caught this way and I know of many other people, including educated Bulgarians falling into the same trap.
If you buy land here in Bulgaria, there is very little to let you know what land you have in fact bought until after the sale, apart from the word of the seller. They can show you one parcel of land but in fact legally sell you somewhere completely different. if you are fooled by this, you are going to have very little chance of changing this afterward. After the sale, once you have registered the land in your name (should be done within a few days), you can then have the land surveyed and mark the boundary posts, only then do you know what you have bought, and if it is wrong you are stuck with it.
Now there is a solution to this, and it is one that I will be using if I buy any more land here. Before the sale, make it conditional that the buyer has a survey done, and that you or a reliable person witnesses the survey being carried out. The witness should take some meter long lengths of rebar, with one end painted a bright colour, and fix them on the boundary marks and then photo them in situ. The problem is you see, that only the owner of the land can have a survey done, not someone wanting to buy it. There is still a change of fraud here if you don't know that the survey team are in fact the official one, get their name in advance and ask someone if that is correct, we know the local team now so won't have a problem! I am told that in some areas you can now go to the land registry office and ask to see the land that relates to the skitza you have been given on their maps and also see it on a photo-map, that would also indicate if there is a problem with the location being falsified. Do not just go on the skitsa itself unless you can positively identify the land from it, such as a road junction for example. We were lucky that we got ripped off but we actually liked the land that was forced on us better than the original land. But it still caused us a lot of problems sorting it out. The land we bought turned out to be 400 meters away from what we were shown. Please don't take anyone's word for this, the owners, the estate agents, anyone, get it checked out for yourself before parting with cash. Your solicitor can't do this for you, they only check on what is on the skitza, not where that land is. That is up to you.