countersignature [ˌkaʊntə'sɪgnətʃə]

例句:

• Please return the duplicate ( n . ) with you countersignature.
  请会签后退回一份.
  
• We return one copy of the contract with our countersignature for your file.
  我们退回一份我们已会签的合同供你方存档.
  
• Unbelievable as it is now, I was required to have a male countersignature on my first mortgage application.
  来自THETIMES