Supermarkets here usually require an employee to approve backpacks. You put your bag on the scales, hit a button saying it's a bag, then an employee comes round to confirm.
In practice, it usually takes longer to get an employee's attention and have them come press the button. So I don't bother. It's usually quicker to bag everything at the end, and I tend to get fewer "unexpected item in the bagging area" issues when balacing everything on the scales.
In practice, it usually takes longer to get an employee's attention and have them come press the button. So I don't bother. It's usually quicker to bag everything at the end, and I tend to get fewer "unexpected item in the bagging area" issues when balacing everything on the scales.