Please note that the transfer of “ownership” is also carried out through the execution of other documents accepted by law, such as – deed of gift, deed of renunciation, WILL, etc. It is usually designed as an extension of the sales agreement. All the conditions mentioned in the first are met and respected in a deed of sale. Here are some of the points mentioned in a deed of sale. In summary, there can be a contract, even if that contract is not written in a document. The document that embodies the treaty is proof, but not the only one, to prove the existence of the treaty. However, there are certain contracts that the law must write to be effective. One of these contracts is the purchase and sale of land. .