据我所知,没有要求附上证书。我猜测可能你同事的翻译件没有translator's declaration。。只是猜测!
我个人建议,
#1. 每个翻译件的下方打印:
Translator's Declaration
I, XXXXXXX(姓名) , understand the Chinese language and the English language; and that, to the best of my knowledge and ability, the statements in the English language in this translation of Chinese Driver's Licence, have the same meanings as the statements in the Chinese language, of original which is attached hereto.
(签名)
盖专业章并写上日期
#2. 连同翻译件附上国内驾照复印件
或者找老魏,910。。。。