When I was in the point-of-sale software industry a decade ago, this was one of the rules of the fraud-detection system our software offered. Employees in caho

When I was in the point-of-sale software industry a decade ago, this was one of the rules of the fraud-detection system our software offered. Employees in cahoots often "returned" unsold merchandise shortly before, or immediately after, store closing. Mainly due to legitimate customers not being present. There were a surprising number of rules that we had developed over time, usually in response to discovery of all the various schemes that people came up with. Buying-then-returning-within-X-minutes was another.