Subject: Important: Action Needed on Overdue Invoice [Invoice Number]
Hey [Client Name],
We’re writing to you about Invoice [Invoice Number] for [Amount], which was due on [Original Due Date] and is still outstanding. It’s now [Number] days overdue.
We’ve sent a couple of friendly reminders, and unfortunately, we haven’t received payment yet.
This is a final heads-up from our side. If we don’t receive payment within [Number] business days from this email, we’ll unfortunately have to [State Consequence, e.g., “pause any ongoing project work,” “temporarily suspend your website/maintenance service,” “escalate this to our collections partner”].
We really want to avoid any interruptions for you, so please, please get this payment processed right away or give us a call at [Accounts Phone Number] to chat about it.
Thanks for your urgent attention to this.
Best,
[Senior Management Name or Accounts Manager Name]
[Your Company Name]