How do I send an invoice that multiple payments can be made?

[canniessavory]

The title of this thread has been updated from: "Please Help"

How do I send an invoice that multiple payments can be made? For example, I have an event scheduled for May and I am requiring that the client pays a deposit. 

Has anyone done this before? 

[RHatch]

Invoices must be paid in full.  The only thing you can do is to send multiple invoices or set up a recuring invoice.