美国的Employment authorization card

上面为什么没有指纹和签名，签名是waived，指纹是not available，请问影响我正常使用吗

Employment authorization card
就业授权卡
双语例句

1、To protect the foreign nationals holding appropriate employment authorization,
为了保护持有工作许可外国居民的权利，
2、Where can I get an “ employment authorization ”?
我在哪能拿到工作许可证？
3As an F-1 student, you are not permitted to work off campus or to engage in businesswithout specific employment authorization.
作为F-1学生，您不被允许工作校园或参与事务没有具体就业授权。
4.After that, this paper focuses on the implementation solution of management by objective ofpassenger transport station, including: preparation, management organization design byobjective, target decomposition, objective commission compilation, authorization duringimplementation, quality and profit center establishment, expert employment, managementprocess control, objective tracing and feedback and so on.
着重研究了汽车客运站目标管理的实施方案，包括执行前的准备、目标管理组织机构设计、目标的分解、目标任务书的编制、执行中的授权、建立品质圈和利润中心、聘请专家、目标管理过程的控管、目标的追踪和反馈等，制定详细可执行方案。

有绿卡后，就无需工卡了。不需要的。

Employment authorization card是一个临时的雇工卡. 注意,Employment authorization card只是一个临时卡. 随时可以吊销和更换. 并且,该卡必须和其他证件一块用. 所以不需要指纹和签名.