上一篇我们谈到诉讼主体的确定问题，本文将从担保的视角对债券持有人的权利救济予以分析。

保证人单方出具《保证函》的效力

Parent company guarantees and performance bonds are typically used in the construction and engineering industries to provide a developer with some security in the event that the contractor breaches the building or engineering contract or, in some circumstances, upon the contractor's insolvency.

In the current economic climate, contractor default is, unfortunately, even more prevalent in the construction and engineering industries, and so the issues surrounding parent company guarantees and performance bonds are very much in focus for developers.