To protect consumers, advertisers have an obligation to display the prices of each product clearly and precisely. However, it may happen that some products are mislabeled, with an incorrect price or barcodes that are unreadable for optical readers. Mislabeling may result in the displayed sale price not being the lowest or advertised price, which may result in price reductions and misleading discount advertisements. Consumers have the right to pay the displayed price, excluding tax and discount, in accordance with the displayed price list. During the sales period, products can be sold in batches or individually, with significant price reductions. Restaurateurs must also display prices clearly and precisely, indicating the seller's or buyer's charge for each product. To facilitate purchasing, products are often packaged individually, with a sign displaying the price. Acquirer shippers, such as ISPs, also have an obligation to display tariff rates for each product. In the event of non-compliance with this display obligation, fines may be applied to protect consumers.