What is the term to challenge the document on finding breach of contractual terms prepared by the supplier?

The consumer is entitled to challenge the document on finding breach of contractual terms, by submitting prior request to the supplier (issuing body) within 30 days from the day when the existence of that document was notified. The prior request is examined by the issuer within 30 days. In case of disagreement with the issuer's reply or no reply received within the established term, the consumer is entitled to challenge the document at ANRE or in court, in the terms provided by art. 14 of the Law on Administrative no. 793-XIV of 2/10/2000. The consumer is also entitled to challenge, within the limitation period (3 years), the invoice on natural gas consumption issued by the supplier under the document on finding breach of contractual terms that led to non-recording or incomplete recording of the natural gas consumed.