Dear (Recipient’s name),
This is a friendly reminder to inform you that your account number (state account/phone number) has an overdue payment of (state amount due). Your payment due date was (state due date) and perhaps you have overlooked it. We are sending the details of the payment once again for your perusal and we hope that you will comply with our request.
In case you don’t pay the amount in (state period) days, we regret to say you will have to pay a fine of (state amount) plus your bill amount. We hope it doesn’t reach that stage as it will create inconvenience for both of us.
If you have any questions, you can call our customer care centre at (state phone number) or email us at (state mail id). We apologise if you have already made the payment by the time this letter reaches you.
Name of company: