Us contact Law(Restatement) on successive assignees from the same assignor is basically similar to korean civil law. However, Us contact Law(Restatement) protects the rights of the first assignee first, and, with the exception of various factors, protects the rights of the second assignee. This is the most obvious difference between Us and Korean law. Given the nature of assignment, it is logical to specify that the first assignee is superior to the second assignee. And it is quite interesting that various factors are being considered to protect the second transferee. In particular, the fact that Us contact Law(Restatement) defines the trade stability as a major consideration differs greatly from that of Korean Civil Law. However, the debtor is able to suffer direct and realistic damages when the bond is assigned doubly. This is because the debtor has no option and is passive. Therefore, the priority of the first and second assignee should be determined from the debtor's point of view. While Us contact Law(Restatement) considers a variety of factors, including trade stability, it is the debtor who should be most protected. Therefore, I think the Korean Civil Law, which sets the order of assignee according to the order of receiving notification, is more reasonable.