Change due date in receivables for credit check

Question

Hi Sappers!!
Scenario: When SAP performs a credit check for a customer we need that pending receivables
(open items) for this customer which have a concrete payment method, don't use due date
for calculation, instead we want to use invoice date for carrying out the credit check
calculation.
Is that posible? Is there any user-exit where we can change this date to be used during
credit check control for documents which fulfill this requirement?
We don't want to change permanently the due date for this kind of documents, we only need to take another date into account when performing credit control.
Thanks so much in advance & best regards

Answer 1

Thanks so much for your quickly answer.
Creating a new payment term is not a valid solution because, we don't want to change any date in the financial document. We just only need to use another data only for credit check. Here you have a concrete example:
Invoice created with invoice date 01/12/2009
Payment method confirming 90 days.
Base line calculated: 01/03/2010
If we create a new sales order, this open item will not be considered exceeded because due date is still in the future.
We want to consider it as exceeded and the due date would be 01/12/2009 but only for credit check. This "new" due date must not be stored anywhere.
Thanks so much once again & best regards