想問有關用電話向外國客戶追收欠款................

Hello,

Mr. XXX, I am sorry to disturb you. This is just a friendly reminder that under your account, there is certian payment overdue. I think it might have been overlooked by your (staff/secretary/wife). I am sure you can remind your (staff/secretary/wife) to send a checque of $XXX to our company. Our address is XXXXXXX. Thank you.

A STRONGER VERSION:

Hello,

Mr. XXX, your account has an overdue amount of $XXX. I would like to remind you to send a checque of $XXX to our company at this address. XXXXXXX. If the payment is not received by (tomorrow/next week/next month), then we would be forced to take further action. Thank you.

I would like to check when I can recieved your payment for XXX.