A system and method of filing documents electronically or otherwise where the documents are secured from modification. The security provides proof that the items to be submitted have remained unchanged since the encryption was applied. A first installation account within a first installation is created, the first installation account having second installation account information relating to a second installation. A user account is stored in the first installation having information stored therein for a user of the second installation. A submission envelope is secured using a digital signature from the first installation, and this submission envelope is stored in the first installation.