Credit Control Area in F-28

Hello,

I have a company with 6 different credit control areas. In SD all is fine, the CCA is attached to the sales area, so no problem.

But in FI I'm having troubles because the CCA field is absent in most transactions. I had to make a workaround for FBCJ and now I'm working on F-28.

If the payment is the same amount as the billing documents no problem, but if I'm posting a difference it is posted automatically to the "standard" credit control area and I can't choose one explicitly.

How can I do this? I want to be able to say that this payment is for CCA X. It makes sense from a business stand point, diferent sales organizations, the money must go into the correct one instead of automatic.

Best regards