"Notepad++ is an open source project without a registered business entity, which makes traditional validation challenging. We’re currently seeking a certificate authority that can issue a code signing certificate directly to “Notepad++” rather than to an individual. If you’re able to provide such a certificate, or know an organization that can, please don’t hesitate to get in touch - we’d greatly appreciate your help."
https://notepad-plus-plus.org/news/8.8.2-available-in-1-week-without-certificate/