Hi, we use delivered quantities as an invoicing policy, for some big customers we use 50% down payments after registering a new order, as a result odoo creates credit notes instead of invoices for the first deliveried products. 

One order can result in 5 to 10 deliveries and invoices.

Is there a way to get rid of these credit notes (with negative delvered quantities) this is very confusing for customers. 

Odoo should create invoices with a total = 0 until the amount of the down payment is reached.

Anyone has an idea on how to get invoices instead of credit notes?

regards