‘아이가 있으니 초인종을 누르지 마라’처럼 더 나은 서비스를 제공하기 위해 전임자가 후임에게 배송 시 주의사항을 적는 용도다.
It is intended for his predecessor to write precautions when delivering to his successor in order to provide better service, such as "Don't ring the doorbell because they have children."