QR code invite link

Can a QR code be used as signing invite link for others to get to a document that requires a Signature ?

You can create a QR code for a form. It can be scanned and the form will directly be opened on your browser.

Here is a useful guide: https://www.jotform.com/blog/qr-code-generator-for-online-forms/

Please review and let us know if this is what you are looking for.