To my knowledge, this is not possible--mainly for legal reasons, I’d imagine.  DocuSign probably doesn’t want someone prepping the envelopes for a company rep to be able to send out pre-signed agreements because the prepper could be putting the representative and the company on the hook for unknown liabilities.
                
     
                                    
            Hi Drewcifer,
 
Thanks for the info, I appreciate it! I had a feeling this wouldn’t be possible, for the reasoning you mentioned above. Do you happen to have any docs supporting this? It’d be handy for me to reference in the future :) Thanks again!
                
     
                                    
            I can’t think of any, sorry.  To be clear, I don’t work for DocuSign.  I’m just a user sharing info with other users.
For your situation, you could maybe do a work-around by including an image of a signature or maybe the person’s face and signature.  Something that makes it personal, but not legally binding.
If you have a small number of these to do, then you could theoretically set your rep as Recipient 1, and some placeholder email for Recipient 2.  Send a dozen of these to your rep, have them sign off on them.  Then you “correct” the envelope to update the email for Recipient 2 to be whomever it is you want to send it to.  That way you’d have signed blank envelopes in a round-about way.