The author considers the legal basis for accounting for electric energy consumption under an energy supply contract in retail markets, as well as judicial practice materials on non-contractual and unaccounted-for electric energy consumption. The legislation provides for special procedures for detecting and fixing such violations, including conducting inspections and imposing penalties. If the act is drawn up with violations (for example, without the presence of the consumer or without recording essential circumstances), it may be declared invalid. This highlights the importance of following formal procedures when drafting an act. According to the author, it is advisable to approve the forms of acts on non-contractual and unaccounted-for energy consumption at the government level. This would avoid discrepancies and possibly help to reduce the number of disputes between the parties to the energy supply contract in the retail markets