In case you get Error returned from DHL webservice : 152 : Billing segment Billing Account Number Conditional Required Error, don't panic! 🙌
The solution is actually super simple.
As a first thing, check that your Account Number has been attached during EXW choice.
Don't you know what we're talking about? Then you can take a look at our guide below!
Click on Account Number under Incoterm option and add there the number which is going to pay for the shipment:
In case you already did that but it still not working, it means that the Account Number hasn't been recognized, verify if it has been included correctly.