The buyer reference ( Leitweg-ID) is required in the “Buyer reference” field (BT-10) in order to identify the invoice recipient. Additional invoice content is also often required in the construction sector in order to ensure smooth invoice processing between the contracting authority and contractor. The following information in particular is often required by public-sector contracting authorities when awarding contracts and should be included in an electronic invoice:
- Project reference (BT-11)
- Contract reference (BT-12)
- Purchase order reference (BT-13)
- Tender or lot reference (BT-17)
- Invoiced object identifier (BT-18)
- Buyer accounting reference (BT-19)
- Seller identifier (BT-29)
- Actual delivery date (BT-72)
- Invoicing period start date (BT-73)
- Invoicing period end date (BT-74)
Before sending your invoice, please check with the contracting authority what information they require in order to process the invoice.
