How to clear past-due invoices for customer?

Hi Experts,

I have orders where credit check failure hold is getting applied due to over-due invoices.

CC rule setup: Order level with "Open receivables balance" - checked

When i ran credit exposure report, it gives me the exposure amount for Customer,But how can i know the list of invoices for a customer that are past-due and how can those be cleared?

I have set max value for "MAXIMUM DAYS PAST DUE" and still see invoices are past due.

any suggestions pls?