I can tell you one more ridiculous thing about tracking. When you lodge a parcel that is under 500g you won't get a postcode for it on your receipt. It's a not a problem when you lodge only one parcel. Now imagine  that you do 10-20-50 at the same time and you can start wondering which tracking # belongs to which postcode, especially when your customer asks for it.

There is one workaround that I have learnt in my LPO from great guys who work there. YOU CAN get a postcode on your receipt for parcels under 500g. It makes tracking information more valuable and you can give tracking # to your customers in this case. However you have to ask your local LPO guys to include postcodes for all parcels no matter whether they are less than 500g or over. I do not think many of them know how to do it. If they do not just ask them to press F5.