Hello, I will answer your question as follows: What should I do if the seal on the electronic invoice is lost after printing? Dear, the electronic invoice is not stamped in the lower right corner for the following reasons: 1. The electronic invoice is not stamped, which is generally caused by incomplete billing software settings. If it is opened in PDF format, you can select comments, form documents and seals in the print selection interface for printing. 2. There is no chapter in the lower right corner of the electronic invoice, but there is a chapter directly above it. If there is no seal, it may be a system failure. Just contact in the background, or after background processing, it can be solved.