Documents to buy property (flat or home with land ) in Poland?

Hi, i live in poland since many years (2013), and I got NIP and PESEL when I got my first short term accomodation. Then I moved to a new flat but I have never formalized the move. I keep using my pesel...so question is: if I need to buy a property i need to fullfil other formalities?

The only thing you need is your ID or passport. You don't need a PESEL, NIP or anything else.

I think a PESEL is associated with your Polish ID / dowod osobisty. All Poles or permanent Polish residents must have a PESEL number, correct?