How to order from foreign online stores? - this is SECTION What is a tracking number? A tracking number is a unique identifier assigned to items sent through the mail. It does not contain hyphens, dashes, or any special characters. Typically, it looks like this: 9405509699938860829083. In addition to numbers, it may include one or more letters, such as TBA094490876000. A tracking number allows you to trace the location of a delivery and its route to the destination. Furthermore, using this identifier, you can check whether the delivery has been received at the warehouse. Do not confuse a tracking number with an order number, which looks like this: ORDER #108-9223429-1685032 (Amazon) or like this: Item number 112122004175 (eBay)."