The Group fulfils its liabilities from contracts with customers with respect to advance payments received, including gas price compensation received for settlements in future months, and prepayments for up to one year.. Revenues adjustments are related to deferred part of revenue related to the loyalty program VITAY, according to which the customer is entitled to future benefits (so-called VITAY points). Points are valid for 3 years from the date they were obtained. During this period, the Group expects to satisfy a performance obligation by exchanging collected points for transferred goods / services to customers and recognise revenues.