채권양수인이 채무자에 대하여 제기한, 채권양도인으로부터 양도통지를받은 다음 채무를 이행하라는 장래이행의 소의 적부(소극)
Legality of a lawsuit of the future fulfillment to implement the payment for the debt after receiving the transfer notice filed by the transferee of the claim against the debtor from the assigner of claim (negative)