Is there a maximum document size? Support | ValidSign 25 May 2020 14:45 Updated Yes, the maximum size for every document is 16 MB. Related articles Which types of documents can I send with ValidSign? Can the sender of mails be changed? How can I change the size / font of (signature) fields? How do I set up additional (SMS) authentication? (2 factor authentication) Reporting: how and what Comments 0 comments Please sign in to leave a comment.