Hello, I sold a car from private to private at the beginning of the year. Unfortunately I had to find out by the report of the tax office that the buyer made the cancellation almost a month later as agreed in writing, the insurance got it turned on with the amounts, so no broken leg, that’s not the point either. At the beginning of the week a unknown person reported to me and said he was in possession of my old car and needed a copy of the purchase contract, which I reason: because the car is to be registered abroad and the other contract is lost. According to some researches it is in fact that the sales contract is needed by the last official vehicle owner, that should probably be me. However, since in the contract also the data of the buyer stand I consider whether it would not be better to blacken them, because of transfer of data etc., purchase price has no other to interest. afte also refused to pass on his data on the phone, I wanted to know what was going on, but he was rather dazzling and ignorant, allegedly he also lost his copy of the contract… How should I behave?