— loan agreement with the bank;
— mortgage;
— a certificate that you are not registered in a neuropsychiatric and narcological dispensary.
To make sure that the apartment is clean, one day before the transaction, request an extract from the Unified State Register. You will be presented with a document that will indicate who is specifically the owner of the apartment and in what order it is received. To get an extract, it is not necessary to inform the seller, just write a statement to the registration center.