What are the possible reason for an order to going on credit check failure hold at the time of booki

Hi,

The order for certain customers are going on credit check failure hold at the time of booking, the message that was showing is 'Overdue invoices found'.Although the customer is not on credit hold.And I check for the bill to adress of the customer in the AR sysadmin responsibility, under collection menu in customer account details and I can find for some customers there are open invoices, for which we are getting this credit check faiure hold. But for some cutomer which are having similar issue there is no record found in the customer account details.So I guess there might be some other