Hi, I have the same request! The law is same in Slovakia. I need a sequential invoice number, but only for those products, which are paid. Sequential numbering plugin is practicly useless, because, sometimes orders are not processed by date they arrived, but by our current stock, In this case, i gate an invoice 004 with todays date, and 005 with two weeks old date, because this order was made first.. not to mention, that some orders are for free, so I dont need an invoice etc, etc… any way to fix work around this problem?
