Hi Mark,
The Notary Public is likely to demonstrate that they have undertaken the legally-required due diligence and unless you have *material proof* that the Notary was negligent or fraudulent –a very difficult thing– it would be very difficult to bring a case against the Notary in these matters.

A far greater risk to foreign residents buying here is renting out a house to the ‘wrong people’: if the property is used for illicit purposes and the authorities begin to prosecute the tenants, it would likely be hard (and expensive) to defend the asset under the new law.