paper trail 
noun
A series of documents providing written evidence of a sequence of events or the activities of a person or organization: it is very important to have a paper trail in the event of a dispute the paper trail led the FBI to him in just six days...
- The paper trail led far beyond the inspector to entrap top bureaucrats and key jurists in the web of corruption.
- Thus a paper trail has led US law enforcement to identify at least twelve of the hijackers with certainty.
- Last night the emergence of a clear paper trail over the visa application for his lover's nanny hastened the collapse of his own political credibility.
- rotameter
- rotan
- rotang
- Rotarian
- Rotarianism
- rotary
- rotary camera
- rotary clothes drier
- rotary clothes line
- Rotary club
- rotary converter
- rotary cowshed
- rotary-cut
- rotary cutter
- rotary cutting
- rotary drill
- rotary engine
- rotary-engined
- rotary hoe
- Rotary International
- rotary kiln
- rotary power
- rotary press
- rotary pump
- rotary quern