Date: [Month Day, Year]

To: [Customer's Name]

Dear [Customer's Name],

We regret to inform you that we must terminate the car rental agreement between [Your Company Name] and yourself, effective [Month Day, Year]. This decision has been made due to outstanding non-payment of rental fees. Despite our previous attempts to resolve this matter, including multiple reminder emails and phone calls, we have not received payment for the overdue rental fees.

Please ensure that the vehicle, [Car Make and Model], with license plate [License Plate Number], is returned to our premises no later than [Month Day, Year]. Any outstanding rental fees or charges must be settled by this date.

If you have any questions or need assistance during this transition, please do not hesitate to contact our customer service team at [Your Company Number] or [Your Company Email].

Thank you for your cooperation and understanding in this matter.

Sincerely,

[Your Name]

[Your Position]

[Your Company Name]

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