I am sure I have seen it happening before, but I always assumed it was after some sort of irregularity or it was manually initiated by a member of staff with suspicions.Just had something which has never happened to me before in the literally hundreds of occasions I've used self scan, at the checkout at my local Tesco I was flagged for a full rescan of my entire shop. Whenever I've been flagged for a random trolley check before I don't remember it ever being for more than half my shop. Has anyone else ever had one of these, all struck me as very odd?
I only use staffed checkouts if I'm doing a large shop at one of the supermarkets these days, it just seems more efficient, even than self scan.