A copy of the signed invoices, manifests, etc. are found within the Custody Log of the delivery.
To find the signed paperwork:
Shipping & Delivery Management > Delivery Tracking block > Search and Select the Delivery > Scroll through Custody Log > Select Details to the right of the Delivered Custody Log
From there, Uploads > Select the magnify glass to open > Right Click & Save Image
Learn more about Wholesale Deliveries...
Finding a Delivery's Tracking Number