이러한 당사자적격부정설도 채무자가 관리처분권을 및 당사자적격을 상실하는 것은 채권자로부터 대위권 행사의 사실이 통지되었다든지, 채무자가 대위권 행사의 사실을 알게 된 때라고 한다.
Even in such a theory of negation of party qualification, it is said that the debtor loses the proper to dispose of management and party qualification as soon as the fact of exercise of subrogation right is notified by the creditor or once the debtor becomes alert to the actual fact of exercise of subrogation right.