Thank you for your remittance advice.
We are concerned that there are a number of overdue invoices which continue to remain unpaid, and these are detailed in the below statement.
These invoices total GBP 15424.40. We are not aware of any reasons why these should not be paid, and must ask that an immediate payment is made to settle the overdue amount.
If payment is being delayed for some reason, could you send me the details as we need to provide detailed explanations as too why these invoices are overdue.
Look forward to receiving your response by return.