Veselina,
Thanks!
If we dig deeper, we can say that the purpose "this" billing block in the sales order was to inform, to use a different billing type. And not per se to block the billing document. So, in theory, another field in the sales order could also be used, to inform the billing department, to use the other billing type (not the default one).
In any case, the billing block was set manually by the user, during creation of the sales order.
when you have no budget for development
With development, what could have been achieved? What design?
TW
Note - a big thanks for sharing these real time experiences!