The amount of input VAT receivables is mainly related to the estimated sales of electricity not read on metering equipment as at the reporting date. The amount of excise tax receivables relates to the exemption from excise tax on electricity generated from renewable energy sources, based on a document confirming the redemption of an energy certificate of origin.
Customer acquisition costs
Costs incurred prior to the execution of a contract for the performance of its subject matter are classified as other assets and recognised as prepayments if it is likely that future revenue from the customer will cover such costs.
As at December 31, 2020 and December 31, 2019, the Group recognised the following costs to be settled over time: