Add additional signor

Can you add an additional signor after the first has signed using Adobe Sign?  The problem we come across is that 3-4-5 signatures may be required but who needs to sign is unknown by the person sending the form for the first signature.  After that is signed, it needs to be forwarded to someone else who will sign...and then someone else who will also sign.  I understand how to do multiple people at the get go, but if I send it to one and then realize another must sign, I can't forward that signed version along for a second signature.