1. I want to create an installment method payment term whereby my customer pays 50% as Advance Payment & 50% Net 45 days. How to configure the 50% advance payment term in OBB8 as system does not take negative days say -1 . I have created Z100 as 50% Advance Payment & 50% Net 45 days, Z101 as 50% Adv Pyt and Z102 as 50% Net 45 days in OBB8 and then assigned the same in OBB9 to Z100, 1, 50%, Z101 and Z100, 2, 50%, Z102. But the payment terms Z101 should be having -1 days instead of 0 days. How to configure this or achieve the payment term of advance payment?
2. My purpose is that during FB70, I should get a warning message that advance payment has not yet been received for this customer having this installment payment term Z100. It should not let me post the invoice unless 50% adv pyt has been received. At present we are not using Down Payment functionality. But I assume that without the Down Payment functionality the same cannot be achieved. Please confirm this.
How can I achieve the above requirements?