Customers will cease to be customers the moment they default in their payment. In our business, they are known as debtors. They may default in their payment for a variety of reasons. Many choose this course of action to improve their own cash inflows at your expense by slowing down their own Accounts Payable. Some debtors may even expect you to write-off these overdue accounts by being inaccessible.
Regardless of their reasons, most debtors will pay only to the creditors that exert the most pressure and follow ups