How to mark your e-invoice
Select only ONE of the following references/cost objects and enter it in the format below:
- Project number incl. project element: P.xxxxxx.x.x (e.g. P.012345.1.4)
- Cost center: Kxxxxx (e.g. K01234)
- Business entity: Fxxxxx (e.g. F01234)
Important: If you enter multiple references or use the wrong format, the invoice will be rejected.