Customer pays partial down payment request amount - clearing

Hi all,

I have an issue with a specific case in managing a down payment request.

I've posted a down payment request of 100$ and my customer only pays me 50$.

When trying to clear the down payment request of 100$ (F-28) with the incoming payment of 50$, the system prevents me from using partial payment functionality by reducing the amount to 50$.

1/ How can i save this partial payment on a customer down payment request?

2/ I tried to manually charge off the difference but the system automatically clear the entire down payment request? It's not what i want

I would need to end up with a reduced down payment request amount.

Thank you for your help

Hein