At least in the UK there is some guidance and judgement around discounted prices being related to a price that was actually used in the past. https://www.asa.o

At least in the UK there is some guidance and judgement around discounted prices being related to a price that was actually used in the past. https://www.asa.org.uk/advice-online/promotional-savings-claims.html https://www.asa.org.uk/advice-online/promotional-savings-cla... I'm not sure how much of it legally enforceable vs adhering to some code of conduct.