The Commerce Commission says companies promoting sales by warning of limited stock must be able to back up those claims.
The prominent online retailer One-Day, owned by the Warehouse Group, has been fined 840-thousand dollars for misleading consumers.
Vanessa Horne from the Commerce Commission told Morning Report specials marketed as for one day only were sometimes available for as long as month, and a stock indicator often bore no relevance to what was actually available for purchase.