Wiktionary
sales slips
n. (sales slip English)
Usage examples of "sales slips".
Tie the sales slips to the salesmen, and you know which men are selling and which are running a milk route.
I let him shuck his uniform and turn his sales slips in to the cashier before I tackled him.
Linda told him she'd been a customer for years and showed him the pile of sales slips she had accumulated.
Mixed right in with sales slips for all sorts of paintings and statues.
Their only remaining hope was getting a serial number off one of the Searab's engines in hopes they could trace it to the manufacturer and from there through the various sales slips to its present owner.