First of all, the purchaser has the right to have the vendor consign the property at the time of the notarised conveyance, upon payment of the purchase price, in its known state, with any agreed accessories, free of persons and things.
It is legitimate for the purchaser to request consignment of the asset before the definitive transfer: however it is not his right to insist upon it, it being left to the discretion of the owner whether or not to allow this (not only because the balance of the purchase price has not been paid, but in view of the ongoing civil, criminal, administrative and fiscal responsibility of the vendor as legal owner).
Vice versa it is also possible for the purchaser, in order to assist the vendor, to delay taking possession of the property until a date after the definitive contract is settled, though it is advisable in such cases to set a limit in the contract itself and to establish penalties for any delay.
The purchaser has the right: to receive from the vendor all the documentation relating to the property (for example, as to any building amnesty as well as receipts for payment of the common property expenses or any mortgage over the property); to be guaranteed by the vendor against eviction and defects; to obtain from the vendor all useful information relating to the property.