1. The invoice is printed on special watermark paper, and the watermark pattern is diamond with the word SW in the middle;

2. The invoice producer seal and invoice number are overprinted with colored fluorescent ink, and the printing color is big red, which will reflect orange under ultraviolet irradiation.

3. For the machine-printed invoices and anti-counterfeiting measures in quota invoice and other places, please refer to the announcement of the tax authorities of the producer.

Inquiry method of ordinary invoice:

1. You can log on to the tax website through the Internet, visit the general invoice query column, enter the invoice code and invoice number of the general invoice according to the website prompts, and quickly query the authenticity of the general invoice in your hand and the issuing unit of the invoice.

2. Take the ordinary invoices that need to be identified to the invoice management department of the local tax authorities, and the staff will identify them.