Questão jurídica principal
Whether the acquisition of title by an auction purchaser in enforcement proceedings can be challenged other than by complaint seeking annulment of the auction sale.
Decisão extraída
The transfer of ownership after an enforcement sale can only be attacked by complaint requesting annulment of the auction award; a private-law challenge is excluded.
Fundamentação extraída
The enforcement sale is not a private-law transaction but an official, public-law act of the enforcement authority. Therefore, neither private-law warranty claims against the purchaser nor a private-law attack on the transfer are available.