Serial number details
To continue subscription contract - maintenance or rental - we need serial number of produkt to which you have the contract. Without serial number we are not able to porceed oreder.
Promotions where you can use old version to get better price is mandatory type valid serial number!
Some add-ons also need serial number of product to which will be installed - usually AutoCAD. In case you see the serial number field in cart, fill it.