1. Anti-counterfeiting mark of handwritten ordinary invoice: (1) The invoice is printed with special water-printed 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 printed color is big red, which reacts with orange under ultraviolet light. Machine-printed invoices and anti-counterfeiting measures in quota invoice and other places can be found in the announcement of the tax authorities of the producer.

Second, the way to inquire about ordinary invoices: (1) You can log on to the tax website via the Internet, visit the column of ordinary invoice inquiry, and enter the invoice code and invoice number of ordinary invoices according to the tips of the website to quickly inquire about the authenticity of ordinary invoices in hand and the issuing unit of this 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. Or: it can be identified according to the characteristics of the new invoice. The characteristics of the new version of invoice are as follows: the inner pages of manually filled invoices and computer invoices are printed with white carbonless copy paper, and the stubs are printed with special carbonless copy paper, which turns purple after copying; Invoice copy, deduction copy and ticket exchange copy use special carbonless copy paper for anti-counterfeiting colored fiber; Other copies use ordinary carbonless copy paper. Special invoices for fiscal cash registers, ordinary quota invoice and scratch-award-type quota invoice use anti-counterfeiting water-printed paper with obvious diamond watermark "SW" on the front and back. 2. The first line of the invoice header of the new version of ordinary invoice is printed with the invoice name and font No.3. The second line is printed with the invoice purpose and font No.3 in bold. The first line in the upper right corner of the invoice frame is printed with the invoice classification code, and the second line is printed with the invoice track number and invoice number in Gothic font. Red, orange fluorescent reflection under purple light; 3. The "National Uniform Invoice Producer Seal" overprinted on the invoice coupon and the deduction coupon. 4. Anti-counterfeiting color bars are printed in the amount column of the invoice coupon and the deduction coupon, which are reflected by orange fluorescence under the purple light. 5. After the invoice is filled out by the ticketing unit and individual, the font of the invoice is purple; The invoice of the dry copy anti-counterfeiting watermark paper invoice is linked with "amount in words", "Customer Name" and "Invoice Date", which is reflected in orange fluorescence under the purple light. If you want to further identify the authenticity of the invoice, please contact the local tax authorities or call 12366 tax service hotline!