You can log on to the website of the local State Taxation Bureau and enter the invoice code in the "Invoice Public Inquiry" window, so that you can check the 20-digit check code of the invoice and check the authenticity of the invoice.

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Since the new version of ordinary invoice was launched in 20 12, the national tax authorities have given a "new ID number", that is, a 20-digit "check code or tax control code" to every ordinary invoice obtained by consumers.

The 20-digit check code is located above the name of the invoice customer. The check code of each invoice is a unique number automatically generated by the invoice management system when the taxpayer issues an invoice. Consumers can use the "check code or tax control code" to query the invoice face information and distinguish the authenticity of the invoice.

References:

State Taxation Administration of The People's Republic of China Shanghai Taxation Bureau? Invoice information query