"签名"用英语怎么说?

1.to sign (one's name with a pen,etc.)
2.to autograph
3.名词：signature
例句：
1.这张纸要求图章而不是签名.
The paper requests signet,not signatures.
2.这份文件上有他的签名.
This document bore his signature.
3.请愿书上有很多签名者的名字.
Many subscribers' names are in the petition.
4.你如果不会签名,画一个十字也可以.
If you can't sign your name,make a cross instead.
5.他们在请愿书上签名,支持工人的请求.
They signed a petition in support of the workers' demands.
6.经过进一步的调查发现签名不是真迹.
On (ie As a result of) further examination it was found that the signature was not genuine.
7.这歪歪扭扭的玩意儿就算是签名吗?
Is this squiggle supposed to be a signature?
8.谁也没记著应当签名.
Nobody remembered to sign their names.