This came up in a recent user meeting of what you can write on a receipt so that its not defined as false advertising or deceptive advertising.
This was highlighted today by me when I read this article on US retailers here.
When it stated
'the company was sued in New York federal court for allegedly deceiving customers in a “systematic scheme of false and misleading advertising, marketing and sales practices” on its J.Crew Factory website, according to the complaint. The plaintiff, Joesph D’Aversa, maintains that the “valued at” price displayed alongside each item — which supposedly indicates the true retail price of a product — was misleading given that J.Crew Factory’s merchandise was always on sale.'
So I made some enquires, basically any claim made should be truthful, accurate, substantiated, and not deceptive.
Say, for example, you say the RRP is $XXX and our price is $YYYY, so you save $ZZZ. It is strongly advised that you have a copy somewhere where it states the RRP. If you say that this large business price is $XXXX, then you should have a copy of the catalogue or their website showing this.
Furthermore, an item has to actually on offer of a price for a substantial amount of time before you can say we reduced our price for it not to be considered deceptive.
It also advised that what you say should be written clearly, in plain English, so it is unambiguous and easy to understand partly because who knows what a lawyer can construe.
I am not a lawyer, but I hope this helps when you are making a note on your receipts.