Every account on Partner Partner has the option to share leads with their partners. It's simple and effective. Go to the Leads tab and click "Send Lead". From there you will have the option to choose one or more of your partners to whom you will distribute this lead.
The first screen chooses the partner(s) and the second collects the details for the lead.
On the partner's end they will receive a notification that you've shared a lead with them. They will then have the option to return to Partner Partner to accept or decline the lead. If the lead is accepted it will then convert to a Deal and show under your Deals tab.
Review how to manage Deals here.
If the lead is declined it will continue to show on this page but with a Status of "rejected".
Learn more about accepting and rejecting leads here.