"I am writing to report a missing order (Order #[Number]). The driver marked it as delivered, but it never arrived at my address. I have checked with neighbors and the surrounding area. Please investigate and issue a refund."
If you are a driver and want to leave a professional message for your customer in the app: UBrt.rar
"Hi! I've picked up your order and am on my way. I'll be there in about [X] minutes!" "I am writing to report a missing order (Order #[Number])