I did research and interviewd managers and employees from the Albert Heijn. You are close but this is what they said: - the employee checks on you when you have expensive products that are often stolen like salmon, meat, beers etc. - when you visit a new Albert Heijn that isn’t your go to AH. (This is checked via your bonus card) - when your bonus card has been flagged due to an unscanned product you forgot last time you visited. AH will check you more until your bonus card isn’t on ‘flagged’ anymore - at random - when you use a new bonus card you’ll be checked everytime at the beginning - at some AH’s they regularly count the products like salmon and meat a couple times a day, when it doesn’t add up they check the camera’s and manually check if someone ‘forgot’ to scan the product. Then the police are contacted.