Questão jurídica principal
Whether the donor could invoke the lack of public deed form for the donation promise despite prior conduct.
Decisão extraída
B. was entitled to rely on the formal nullity; invoking the defect was not a manifest abuse of rights on the established facts.
Fundamentação extraída
The promise of donation was knowingly not made in public-deed form by both parties; the agreement had not been essentially performed beyond temporary use of the garage, and in such a case art. 2(2) CC does not create a right to compel performance of a formally invalid contract.