VERB
连署，副署，会签(文件)
If you countersign a document, you sign it after someone else has signed it.
例句
The President has so far refused to countersign the Prime Minister's desperate decree...
总统到目前为止仍然拒绝在首相那条孤注一掷的政令上连署签字。
Dolores, please come in and countersign a cheque.
多洛雷斯，请进来连署支票。