To check the authenticity of an invoice, you can follow these steps:

First, open your browser, type in "State Administration of Taxation" to search, and click on the link to the official website. In the page layout of the official website, you will see the "Services" section, scroll down to find the "Invoice Query" option, and click to enter this functional area. Next, get ready to verify your invoice information. On the Invoice Inquiry page, you'll need to enter a few key pieces of information: invoice code, invoice number, invoice date, and the amount invoiced excluding tax. Make sure all the data is accurate, as it's about the reliability of the query results. Finally, enter the verification code provided on the page and click the "Check" button, the system will compare and verify the invoice to show the authenticity status.

With these steps, you can effectively check the authenticity of your invoices and ensure that your rights are not violated.