This detection rule flags users who scan a receipt with an unusually high total amount. Flagging large transactions for review is beneficial just as a best practice. Large transactions may indicate employee fraud (creating a large receipt, scanning it, and then voiding the transaction) or guests earning on large catering orders despite your company not typically allowing it.
The Threshold amount can be defined in the provided field under the rule. It can be found under the "Activity Detection Rules" in the "Settings" section on the dashboard. Please find the screenshot below. 
What does the "Receipt has amount more than threshold amount" activity detection rule mean?
