If tickets are not given, passengers can complain to the bus company. The staff of the Complaints Section of the Public Transport Group said that they had issued an invoice for each bus. These invoices are all made by quota invoice, a local taxation bureau, and stamped with the unified national invoice producer seal. There is a code and invoice number on the invoice, and there is a special seal for transportation and passenger transport industry at the bottom of the invoice. They are all formal invoices, and passengers will not be refused tickets because the fare is one yuan.