make sure everyone involved is real agent/notary/seller.
I can vouch that this one is real:
63 hours?? Balls to that. I never heard such nonsense.
Are you buying from a developer or a private owner?
It's a very basic, straightforward process in Poland. If it's a private owner, they should have a little scrap of paper which confirms their ownership. It has a reference number on it relating to the entry in the registration book. Trot along to the Land Registry which is located in the local court, inspect it and confirm that they're the owner. Any member of the public can do that. It'll also give details of any mortgage as far as I remember.
Ask to see up to date bills for utilities, property tax etc so you know there's nothing outstanding.
The main problem is that you can't be sure if the seller's ID is genuine but a lawyer won't do that anyway so it's just a chance you take.
Oh and you should check at the Urząd Gminy to confirm if anybody is registered as living at that address. You don't want that.
That's about it really. The Notary does sod all. They're just there to make the transaction legal by witnessing it. However he can confirm for you which checks you need to make
As a foreigner, you'll also need a sworn translator for the actual signing of the documents, even if you speak Polish. After the signing you'll get a copy of the contract and the Notary keeps the original. A few weeks (or months!) later the Land Registry will send you the little bit of paper to confirm the change of ownership has been recorded.