paper certifying its status as a legal person

例句：

1. 1. The student handed me a piece of paper with his name written on it.
   学生递给我一张纸条，上面写着他的名字。
2. 2. She wrote her name in the margin of the book.
   她在书的边角处写了她的名字。
3. 3. The teacher asked us to write our names on the blackboard.
   老师让我们在黑板上写下我们的名字。