According to the law on the registration of sales, the seller is obliged to issue a receipt to the buyer. He is also obliged to register a revenue received from the Tax online; in case of technical failure, then within 48 hours.
In the event that between us and the consumer to the emergence of a consumer dispute arising from the purchase contract or a contract for services that can not be solved by mutual agreement, the consumer may file a petition for judicial resolution of such disputes body designated court settlement of consumer disputes, which is the Czech business inspection.
Central Inspectorate – ADR department,
Consumers can also use the platform for online dispute settlement, which is established by the European Commission at http://ec.europa.eu/consumers/odr/.