Hi Pawel,
It is is true that the API is slightly more restrictive than the GUI in this matter.
If you add an invoice number it must correspond to an invoice that has already been registered. If you do not add an invoice number it will ignore it.![]()
It is is true that the API is slightly more restrictive than the GUI in this matter.
If you add an invoice number it must correspond to an invoice that has already been registered. If you do not add an invoice number it will ignore it.