Dual quality refers to a situation where manufacturers sell their products in different countries under the same brand and in the same or very similar packaging, but with different product composition or properties. Sometimes, it is necessary to adapt the composition of some products to local tastes, habits, suppliers, or other conditions of production, but in some cases, dual quality has no objective reason. The dual quality of daily consumption goods was proven to exist in the European Union (EU) by several comparative tests, although its geographical pattern dividing the EU into eastern and western parts was not confirmed. There are several subjects involved in the problem of dual quality in Europe: manufacturers, politicians, media, and consumers. However, research on consumers’ opinions about dual quality was lacking. A few studies were conducted in the Czech Republic about the opinions of consumers on dual quality, but similar research was never conducted in the Slovak Republic. Therefore, our research is unique. However, we are not able to compare our results with other data from the Slovak Republic. According to the results of our survey, the majority of consumers in the Slovak Republic have heard about dual quality in the EU, and 57% of them have their own experience or know someone with experience with dual quality. Several tests were performed to prove the existence of dual quality. Most of the tests on a national level were aimed at food products, but Slovak consumers have more experience with non-food products. However, they are more concerned about the dual quality of foodstuffs. Many consumers refuse dual quality or, if it is necessary, they demand that information about the specific composition of the product adapted to local habits be displayed on the packaging of products. According to the results of both secondary and primary research, several specific recommendations have been formulated for manufacturers of products with dual quality.
