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在合同无效或被撤销后,返还财产请求权的性质应该在不同的物权变动模式下分别讨论。当在债权形式主义模式下,因为区分原则的作用,物权效力并不直接恢复原状。因此,不能适用物权请求权,而只能适用不当得利请求权。在意思主义模式下,物权效力与合同效力一致,则发生物权请求权与不当得利请求权的竞合,当事人可以选择适用。而对于有过错一方的损害赔偿,如果存在信赖利益则适用缔约过失责任,如果没有信赖利益就应适用侵权责任。
After the contract is invalid or withdrawn, the nature of the right to return the property should be separately discussed under different modes of change in property rights. When in the form of creditor’s rights formalism, because of the principle of the principle of distinction, the effectiveness of real right does not directly restore the status quo ante. Therefore, the right to claim can not be applied, but only the right to improper claim. In the mode of intellectualism, if the effectiveness of the property right is consistent with that of the contract, the competing claims of the real right and the right to improper profit occur, and the parties may choose to apply. As for the compensation for the fault of the party who has the fault, the fault liability of the contracting party is applicable if there is a trust benefit, and the tort liability should be applied if the trust benefit is not relied on.