When a party completes all documents, they are brought back to the package+disclosure page (as configured in the package). The package+disclosure has e-sign disclosure statements required by law, a list of all documents the user has to process or has already completed, a button to download the completed documents when all done, etc.
The default package+disclosure comes from the ESF/Library/Template document
StandardPackageDisclosures. You can just create your own document like
"Disclosures" in the your library and copy/paste from the other template library (probably best to copy and paste while in SOURCE mode to get all of
the logic). There are no real parties, fields or custom logic for a
package document, so it's easy to copy over.
Then in the package, change the 'Package+disclosure view' to use
your document.
Another option is to create a landing page on your company web site after it's all done you can control the message
directly from your own web site, and then use the package party to
specify the "done URL" to point to that web page.