The Portugal civil theory never takes causa as a factor of obligations,unlike the principles in FrenchCivilCode,sincetheageofCódigo de Seabra.Underthecircumstancesoflegaltransactionandthe drafting of contracts,Portugal(Macau) civil law adopted the legislative model which stands on the ground of Anticausalista.Theonlyplacethatcausaexistsisinenriquecimento sem causa(unjustenrichment)regime. Because the obligation of unjust enrichment has no bilateral nature. However,although Portuguese civil law theorydoesnotadopttheDingliches RechtsgeschäftofGermanlaw,thedoctrineofcausaisstillbeingdiscussed in the acquisition of property regime. It actually reflects the confusion of discussion:the context is not clear enough. Furthermore,in a legislation which has no ground of Dingliches Rechtsgeschäft theory,it is superfluous to discuss the causa of property acquisition.%葡萄牙民法自《塞亚布拉法典》伊始，就没有效仿法国法中将原因作为债的构成要素的做法。在法律行为的形成与合同成立的范畴方面，葡萄牙（澳门）民法可谓是最为彻底的反原因论立法例。“原因”存在的场合主要限于“无因得利”当中，因为无因得利中恰巧缺少对价和双务性。然而葡萄牙民法受到德国民法深刻影响，虽没有采纳物权行为理论，“原因”概念却仍出现在所谓“物权要因原则”当中。这实际上反映出葡国学者对不同语境下具有不同面貌的原因概念，讨论并不充分。况且，如果不采物权行为理论，那么对“要因”的讨论就是多余的。
展开▼
