“关乎众人之事,应经众人同意”(Quod omnes tangit,omnibus tractari et approbari debet)。~①中世纪时,人们从罗马法中发现了这条规则。这条规则原本旨在处理一名被监护人同时有多名法定监护人的问题。典型情况下,一名监护人的同意就构成了对于被监护人的合法交易的充分授权。因为所有与此相悖的规则都严重危害商业往来,必须保护商业伙伴的信任。另一方面,一名监护人的同意足以构成合法授权——这种考虑并未解除其他被监护人的责任,也并未 “Quot omnes tangit, omnibus tractari et approbari debet.” During the Middle Ages, people found this rule from Roman law. This rule was originally designed to deal with the issue of having a legal guardian with one guardian at the same time. Typically, the consent of a guardian constitutes a full authorization of the legal transaction of the ward. Because all of the rules that go against it seriously jeopardize business dealings, the trust of business partners must be protected. On the other hand, the consent of a guardian suffices to constitute a legal authorization - this consideration does not relieve the other guardian of responsibility, nor does it