Abstract
The subject of this article is the Th e “Deal-of-the-day” operators (discount website operators, such as Slevomat in the Czech Republic, or Groupon at the international level) and their practices, which can be unknown territory for most of their consumers. “Deal-of-the-day” websites (discount websites) are websites offering consumers a service to buy discounted (oft en gift ) certificates (coupons or vouchers) which can be used at local or national companies. When examining the issue deeply, we realise that there are many potential threats for the consumers who are not as well protected by consumer law as they should be. The article covers these problematic areas.