How can a merchant report without invoicing?

Legal Analysis: Merchants can complain without invoicing 12366. Consumers complain to the administrative department for industry and commerce by letter, fax, SMS, e-mail, 123 15 website or go to the industrial and commercial department to explain the contents and reasons of the complaint.

Legal basis: Article 19 of the Measures for the Administration of Invoices in People's Republic of China (PRC), if a unit or individual sells goods, provides services or engages in other business activities receives money from outside, the payee shall issue an invoice to the payer; Under special circumstances, the payer will issue an invoice to the payee.