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 What is the difference between an administrator and a user? How to cancel a signature in progress? I reached the maximum number of SMS codes generated for my signature Universign's identity validation principles How do you check the signature on a document signed by Universign with Adobe Reader?