The consumer asserts that his or her decisions are consistent and rational. Basically, we must distinguish between real and presumed awareness. Real awareness is rooted in the knowledge of consumer rights, while presumed awareness exists only in the consumer’s belief in himself. The purpose of my research is to assess the level of consumer protection knowledge of the respondents and to draw conclusions about the consumers’ awareness, i.e. to measure awareness in terms of consumer protection on the online markets. I can state that the rules of the 14 day period of withdrawal without stating reasons when shopping online and the VAT and customs duty obligations of foreign webshops are less known by online customers.