Hi,
I guess it is possible. Try researching in the path below:
Financial Supply Chain Management > Credit Management > Integration with Accounts Receivable Accounting and Sales and Distribution > Integration with Sales and Distribution > Customer Enhancements > BAdI: Fill Line Items for Credit Exposure Update
When you set the sales order it is possible the system checks these invoices paid by "checks". But you've to ask a ABAP help.
JPA