We must keep in mind that, in any circumstance, CPCV does not have the effect of transferring ownership of the asset to which it relates. This effect is only obtained with the signing of the promised contract, that is, the deed of purchase and sale. On the other hand, like any contract of a mandatory nature, the CPCV only generates effects between the parties that celebrate it. Consequently, by nature, the CPCV cannot be opposed to a third party, which means that none of the contracting parties will be able to enforce a right resulting from that CPCV before anyone other than its co-contractor.
To formalize your housing purchase decision, you must enter into the promissory purchase and sale contract. This contract must appear in a written document, signed by both parties, and contain the face-to-face signature of the promising seller and buyer and the certification, by the notary, of the existence of the respective use or construction license. The promissory contract is an essential document since it regulates the rights and duties of the parties and the conditions established for the business, in the period between the date of its execution and the date of the execution of the public deed of purchase and sale.