paper trail
A written record, history, or collection of evidence.
Keep a good paper trail in case anyone asks you why you arrived at that conclusion.
verb
To follow behind (someone or something); to tail (someone or something).
The hunters trailed their prey deep into the woods.
To drag (something) behind on the ground.
You'll get your coat all muddy if you trail it around like that.
Our little life is but a gust That bends the branches of thy tree, And trails its blossoms in the dust!
To leave (a trail of).
He walked into the house, soaking wet, and trailed water all over the place.
To show a trailer of (a film, TV show etc.); to release or publish a preview of (a report etc.) in advance of the full publication.
His new film was trailed on TV last night.
There were no surprises in this morning's much-trailed budget statement.
To hang or drag loosely behind; to move with a slow sweeping motion.
The bride's long dress trailed behind her as she walked down the aisle.
Even now I behold a sign, A threatening of wrath divine, A watery, wandering star, through whose streaming hair, and the white Unfolding garments of light, That trail behind it afar, The constellations shine!
noun
The track or indication marking the route followed by something that has passed, such as the footprints of animal on land or the contrail of an airplane in the sky.
trail of blood
condensation trail
A route for travel over land, especially a narrow, unpaved pathway for use by hikers, horseback riders, etc.
A route or circuit generally.
Politicians are on the campaign trail in preparation for this year's election.
A trailer broadcast on television for a forthcoming film or programme.
A walk in which all the edges are distinct.
name
A city in British Columbia, Canada.
A city in Polk County, Minnesota, United States.
A census-designated place in Jackson County, Oregon, United States.