Thank you for the reply, now it is clear for me. I'm just a translator. This is a contract between a purchaser and a seller (in the contract, indicated as "Vendor") about a property to be sold. It should be translated from English into Russian, . In England, before the contract is concluded, the property sold should be checked according to section 110 of the Land Registration Act 1925 - this is what I found about contracts of this kind. As l understand, they want to prove that the owner of the title is the right person to whom the property belongs.