The formats of tracking numbers vary by product. It usually appears to be one of the following formats: 2 alphabets + 7 digits (e.g. AA 000 000 0), 4 alphabets + 10 digits (e.g. AA AA 000 000 000 0), 2 alphabets + 9 digits + 2 alphabets (e.g. AA 000 000 000 AA), 12 digits (000 000 000 000). Some other less common formats may also exist.
If you have any question regarding the delivery process of a package, call [+44] 08448-00-44-66.
The most common cause is incorrectly typed tracking number. It is advised to check with the sender if you are not sure what the number is. Besides, it may take some time (usually up to 24 hours) for a new shipment to show up in the system.
It is advised to check with your local office for accurate results, because the hours of delivery vary by product and location.