这是我们的工作证件。

Here are our identifications. (Or, Here are our IDS.)

youdao

但当他出示他的工作证件(挂在脖子上)后，于是就让他进入。

But after showing his credentials (notice in the picture below that he's wearing his badge around his neck) he was allowed to enter the building.

youdao

审计人员向有关单位和个人进行调查时，应当出示审计人员的工作证件和审计通知书副本。

Auditors shall, in making investigations among units and individuals concerned, produce their auditor's certificates and copies of advices of audit.

youdao