Download a completed signing with a digital signing certificate

Go to Signings> Completed, locate the desired signing and click the Download Signed PDF   icon:

Select Zip from the drop-down menu (the Document PDF option does not include the digital signing certificate):

The zip file downloads to your web browser's Downloads folder and the digital signing certificate appears after the completed document(s). 

Each document will appear individually (this is the only way to separate documents in a completed signing).

Note: you can only get a digital signing certificate for a fully executed signing.