Here several people who was last payment and sign title deed at notario (escrityra). For spanish law after that title deed send to "Registro de la propiedad" for change name old owner (in our case - this is builder "Aranal Sur 21 S.A.") at name of new owner. If you new owner you can get "nota simple" at your owner name. Who got "nota simple" at your new owner name?
Vlad