endorsement of bill meaning in English

背书提单
汇票背书

In the chapter one , the following questions are discussed and introduced : elements , categories of forged endorsement of bill and interrelated conceptions ; should an unauthorized signature be treaded as a forged action or a valid action and which of enactment is more feasible
在第一章中就伪造背书的构成要件、分类及与相关概念的区别加以介绍，着重对票据背书行为中的无代行权人代行签章是按无权代理抑或伪造背书处理，何者更为可行