Subject: URGENT: Final Notice Regarding Overdue Invoice [Invoice Number]
Dear [Client Name],
Despite our previous reminders, Invoice [Invoice Number] for [Amount], originally due on [Original Due Date], remains unpaid. The outstanding balance is now [Number] days overdue.
This is a final notification regarding this overdue payment. Unless payment is received within [Number] business days from the date of this email, we regret to inform you that we will be compelled to [State Consequence, e.g., “pause all ongoing project work,” “suspend website hosting/maintenance services,” “refer this matter to a collections agency”].
We strongly urge you to complete this payment without further delay to avoid any interruption to your services or further action.
Please remit payment immediately or contact us at [Accounts Phone Number] to discuss this matter urgently.
Sincerely,
[Senior Management Name or Accounts Manager Name]
[Your Company Name]