How to manage "Leasing activity" in Zoho Books

How to manage "Leasing activity" in Zoho Books

Hi , 
I would like to have insight about how to manage leasing activity. I mean :
- I have customers who own equipment from my company and the invoices today in Sage are at their name
- But the real payor and owner of the equipment is the Bank who has a contract with my customer. In Sage today I have a specific field who tells its a third paty payor. The Bank is the paying the bill but my customer is the one using it. 

I didn't find anything in Books to manage this. I can't believe I'm the only one doing leasing activity with zoho books. Can someone help me , please? 

Thanks