**Background.** According to the legal regulation in Lithuania it is illegal to sell alcohol beverages to individuals under age of 20. If a custumer seems like younger than 25 years old then there is a legal requirement for retailers to ask for age verification document, and if the age verification is not provided, alcohol can not be sold. We plan a study aiming to evaluate the compliance of existing regulation on age verification in Lithuania for age group 20-24. The experiment results may also raise additional study questions for the enforcement of legal purchase age of 20 years old.