The phrase "paper trail" means a record of documents or written evidence that shows a sequence of events or actions. It is used to track and verify information by following a trail of physical or digital paperwork. Full definition
It is very important to have a clear paper trail of where the down payment and closing cost money is coming from. (firsttimehomefinancing.com)
Lenders will need a verifiable paper trail for gift funds, usually with a cashier's or certified check. (veteransunited.com)
They must learn the basics of negotiation, how to write letters and create paper trails, and how to measure their child's educational progress with norm referenced testing. (educationworld.com)