An open letter has been published in the United Kingdom addressed to online retailers, reminding them of the need to comply with pricing rules when selling goods via the internet. According to the requirements, mandatory delivery fees must be included in the total product price and displayed to consumers before the purchase is completed, rather than added at the final stages of order checkout. This measure is aimed at increasing transparency for buyers, who often encounter situations where the advertised product price turns out to be lower than the actual amount to be paid due to additional fees that are only revealed during the order placement process. Such a practice can mislead consumers regarding the actual cost of a purchase. The letter emphasizes retailers' obligation to inform customers in advance and honestly about all unavoidable expenses associated with purchasing goods, including delivery, if it is a mandatory condition of the purchase. Compliance with this requirement is considered part of protecting consumer rights and preventing unfair practices in the field of electronic commerce. The initiative reflects a broader trend of strengthening control over the pricing policies of online stores in the United Kingdom, aimed at creating equal and clear conditions for buyers when making purchases online.