Payment Reminder - No contacts for the customer

Payment Reminder - No contacts for the customer

Hi, I setup payment reminders and had many of them bounce back with the following, even though there is an email listed for the contact. Any idea why that would be?

Payment Reminder - No contacts for the customer "Customer Name"

Hello,

Payment reminder for invoice INV-58 dated 11 Sep 2012 is not yet sent to "Customer Name", as contact details are not available for this customer. Please send the reminder manually.