Dear [Customer Name], We regret to inform you that we are currently experiencing an unforeseen situation that has made it impossible for us to fulfill your recent order placed with us. We are sincerely sorry for any inconvenience this may cause you, and thank you for your understanding in this matter. [Specify the reason for the inability to fill the order, such as:] Unfortunately, due to an unexpected increase in demand, our inventory has been depleted faster than anticipated. Despite our best efforts to restock promptly, we are unable to fulfill your order within the promised timeframe. We understand that this is not an ideal situation, and we assure you that we are taking immediate steps to rectify the issue. Our procurement team is actively working to source the required products and ensure that such a delay does not occur in the future. To offer an alternative solution, we would like to propose one of the following options: 1. Partial Fulfillment: If you can accept a partial shipment of your order, we will send the available items immediately and deliver the remaining items as soon as they become available. 2. Alternative Product: We have identified a similar product that can meet your requirements. If you find this option acceptable, we will replace the original items with the recommended product. If the alternative product does not align with your needs, please let us know, and we will cancel your order promptly. 3. Full Refund: If neither of the above alternatives are suitable, we will issue a full refund of your payment. The refund will be processed within [number of days] business days, and you can expect the amount to be credited back to your original payment method. Once again, we sincerely apologize for the inconvenience caused by our inability to fulfill your order. We understand the importance of timely delivery and assure you that we are working diligently to prevent such incidents from happening in the future. If you have any questions or concerns regarding your order or the proposed solutions, please do not hesitate to reach out to our customer service team at [contact information]. Your satisfaction is of utmost importance to us, and we will do everything we can to resolve this matter to your satisfaction. Thank you for your understanding and continued support. Sincerely, [Your Name] [Your Position] [Company Name]