If the principal nominates a representative to act as case - of - need in the event of non - payment and / or non - acceptance the collection instruction should clearly and fully indicate the powers of such case - of - need 如果委托人指定一名代表作为在发生不付款和（或）不承兑时的预备人，托收指示中应清楚地、详尽地指明该预备人的权限。
