You can ask for an invoice. There is also proof of consumption on the day, such as the consumption of the detailed list, you can tell the restaurant at the time of consumption of the date, the approximate amount of money, the table, so that the restaurant to check if there is no invoice should be given to the open.

Legal analysis

If the flow rate is much lower than the minimum flow rate to ensure accuracy, it will lead to no output (such as vortex flowmeter) or the output signal is treated as a small signal to be cut (such as differential pressure flowmeter), which is unfavorable to the supply side, there is a loss of justice. In order to prevent the loss of benefits, for a specific set of thermal energy measurement equipment, supply and demand sides are often based on the range of flow measurement and the range of degrees that can be achieved, agreed that a first-class value for the "agreement on the lower limit of the flow", and agreed that if the actual flow rate is less than the agreed value, in accordance with the lower limit of the charge flow rate charges. Measurement of the people's government above the county level, the administrative department can set up according to the need for metrological verification institutions, or authorize other units of metrological verification institutions, the implementation of mandatory verification and other verification, testing tasks. The implementation of the preceding paragraph of the calibration, testing tasks of the personnel, must be qualified by the examination. This function is usually realized in the flow display meter. Measurement of the local people's government at or above the county level in accordance with the needs of the region, the establishment of social common measurement standard instruments, by the higher people's government measurement of the administrative department to preside over the assessment and qualified for use. Enterprises, institutions according to the needs of the establishment of the unit can be used in the measurement of standard instruments, the highest measurement of its various standard instruments by the relevant people's government measurement of the administrative department to preside over the assessment of qualified for use. Metrological verification should be in accordance with the principle of economic rationalization, local and nearby. Measurement verification must be carried out in accordance with the national measurement and verification system table. National metrological verification system formulated by the State Council metrological administrative department.

Legal basis

"Chinese People's Republic of China *** and the State Invoice Management Law" Article 22 of the invoice shall be issued in accordance with the prescribed time limit, order, columns, all the joints at once and truthfully issued and stamped with the invoice seal. Any unit or individual shall not have the following false invoicing behavior: (a) for others, for their own invoices do not correspond to the actual business situation; (b) so that other people for their own invoices do not correspond to the actual business situation; (c) the introduction of other people to issue invoices that do not correspond to the actual business situation.