It is reasonable for catering co., ltd to invoice rice flour oil. Places engaged in catering business activities shall issue invoices to consumers after providing food to consumers and charging corresponding fees. Legal basis: Article 19 of the Measures for the Administration of Invoices in People's Republic of China (PRC). Units and individuals that sell goods, provide services and engage in other business activities collect money from outside, and the payee shall issue an invoice to the payer; Under special circumstances, the payer will issue an invoice to the payee.