Is there a maximum size for one/several document(s) that I want to have signed? You can create a collection of signatures with a maximum of 10MB. A collection can comprise of one or several documents. Related articles Universign's identity validation principles What is the difference between an administrator and a user? How to cancel a signature in progress? How do you check the signature on a document signed by Universign with Adobe Reader? Are documents to be timestamped limited to a certain number of pages or a maximum file size?