paperwork
noun [ U ] uk/ˈpeɪ.pə.wɜːk/ us/ˈpeɪ.pɚ.wɝːk/
B2 文书工作
the part of a job that involves writing letters and reports and keeping records
（与某一工作、交易、旅行等有关的）资料，文件
the written records connected with a particular job, deal, trip, etc.
I've kept all the paperwork for the car. 我把这辆汽车的所有资料都保存了下来。