在航运方面，为了权宜起见，托运人或承租人可以出具LOI，要求船东承担额外风险。LOI最常见的一种情况是在没有出示正本提单的情况下交付货物，因为在卸货港无法获得正本提单。

在未出示正本提单情况下放货

国际保赔协会集团(IG)已经创建了一系列的标准LOI格式，包括涉及无正本提单放货的保函格式‘Group A’。内容规定如下：

‘The above cargo was shipped on the above ship by [insert name of shipper] and consigned to [insert name of consignee or party to whose order the bill of lading is made out, as appropriate] for delivery at the port of [insert name of discharge port stated in the bill of lading] but the bill of lading has not arrived and we, [insert name of party requesting delivery], hereby request you to deliver the said cargo to "X [name of the specific party] or to such party as you believe to be or to represent X or to be acting on behalf of X"  at [insert place where delivery is to be made] without production of the original bill of lading.’

“上述货物已通过[填上托运人名称]托运并载于上述船舶，收货人是[填上提单上的收货人或当事方的名称]，在[提单中注明卸货港名称]交付。但由于提单尚未到达，我们[填上要求放货的一方名称]，特此要求你方在无正本提单的情况下将上述货物在[填上交货地点]交付给“X[特定方的名称]”，或任何你方认为是或者X代表或代表X行事的一方。”（翻译仅供参考，一切以原文为准）