Most of our products are listed on Amazon, and for those who have an Amazon account, it might be convenient to order the product on this Internet marketplace. However, in this particular case, it is better to order the goods directly from the ProMarket-EU online store, for the following reason: buying on Amazon you pay money online to the middleman (Amazon payment system), but Amazon doesn't issue invoices. On the other hand, the real seller, which sends you the product, does not have the necessary buyer's data to issue the correct invoice. In addition, it is hard to be sure whether the tax office will accept the documents, given that the payee and the supplier are different subjects. Therefore, if you need documents to request the bonus for the purchase of a drinking water purification system, it is better to buy such a system directly from the manufacturer's representative. In addition, it will be cheaper, because the price of goods does not include additional commissions of the middleman, in this case. The ProMarket online store is open for clarifications and additional information. Requests can be sent by email and through a special form. If you have a related business (for example, a home goods and household appliances store, a pharmacy, or a plumbers business), you can offer your customers a new useful, high-quality and profitable product. For wholesale discounts and special offers, please email ProMarket.