Dear [Customer], We regret to inform you that your order #[Order Number] placed on [Order Date] for [Product/Service] cannot be fulfilled due to unforeseen circumstances. We sincerely apologize for any inconvenience caused by this cancellation. Although we strive to meet all customer requirements, sometimes situations beyond our control arise, which prevent us from fulfilling our commitments. We apologize for any inconvenience caused by this cancellation and appreciate your understanding. Please be assured that we have taken immediate steps to rectify the situation and are actively exploring alternative solutions to ensure this does not happen in the future. Your satisfaction is our top priority, and we value your patronage. In light of the unforeseen circumstances, we will be refunding the full payment made towards your order. You can expect the refund to be processed within [X] business days, and the amount will be credited to the original payment method used during the time of purchase. We understand that this cancellation may have caused inconvenience, and we deeply regret any disruption it may have caused to your plans. We appreciate your understanding and patience in this matter. If you have any further questions or concerns, please feel free to contact our customer support team at [Phone Number] or via email at [Email Address]. Our team is available to assist you and address any queries you may have. Thank you for your understanding and cooperation. We hope to have the opportunity to serve you better in the future. Sincerely, [Your Name] [Your Title/Position] [Company Name] [Keywords: Alameda California, Sample Letter, Cancellation, Unfilled Order, Order cancellation, Apology, Refund, Customer satisfaction, Customer support]