To activate the e-invoice in ZUGFeRD format, go to your system settings in the Invoice area. Activate the e-invoice there and add your company data.
Then please go through your customer list once and complete the newly appeared field Country code
If you now send an invoice from your LDB, there is an embedded attachment in the PDF, an XML file that maps the X invoice format. You can display this in a PDF viewer.
VAT ID
customers.DDF_UID
Mandatory for invoicing foreign customers.
Mandatory for domestic invoices (AT) exceeding €10,000.
Buyer Reference
customers.DDF_Buyer_Reference
Used for field BT-10 in e-invoices.
Mandatory for invoicing public authorities.
Vendor number/Seller IDcustomers.DDF_Seller_ID
Used for field BT-29 for e-invoices.
Email address of the buyer/recipientcustomers. DDF_Buyer_Electronic_Address
Used for field BT-49 for e-invoices.
If this field does not exist, customers.email is used.
Order Number
invoices.DDF_Order_Reference
Used for field BT-14 in e-invoices.
Mandatory for invoicing public authorities.
Buyer's Order Number
invoices.DDF_Buyer_Order_Reference
Used for field BT-13 in e-invoices.
Service Period From
invoicesDDF_Billing_Period_Start
Used for field BT-73 for e-invoices.
Service Period To
invoicesDDF_Billing_Period_End
Used for field BT-74 for e-invoices.
Delivery timeinvoices.DDF_Delivery_Time
Used for field BT-72 for e-invoices.
Object referenceinvoices.DDF_Object_Reference
Used for field BT-18 for e-invoices.
Document noteinvoices.DDF_Document_Note
Used for field BT-22 for e-invoices.
There are two permitted formats for e-invoices:
We support the CII format, but not the UBL format.
| BT Code | Meaning / Purpose (EN 16931) | Field(s) in LDB |
|---|---|---|
| BT-10 | Buyer reference in Germany = Leitweg-ID |
Customer master data: customers.DDF_Buyer_ReferenceMandatory for public authorities / XRechnung |
| BT-13 | Buyer's purchase order reference | Invoice master data: invoices.DDF_Buyer_Order_Reference |
| BT-14 | Seller's sales order reference | Invoice master data: invoices.DDF_Order_Reference |
| BT-18 | Invoiced object identifier | Invoice master data: invoices.DDF_Object_Reference |
| BT-22 | Invoice note, free text | Invoice master data: invoices.DDF_Document_Note |
| BT-29 | Seller identifier, e.g. creditor number | System settings and customer master data: customers.DDF_Seller_ID(master data takes precedence when set) |
| BT-43 | Seller contact email address | System settings (invoice) |
| BT-49 | Buyer electronic address, routing/delivery | Customer master data: customers.DDF_Buyer_Electronic_Address,fallback customers.email |
| BT-72 | Actual delivery date | Invoice master data: invoices.DDF_Delivery_Time |
| BT-73 | Invoicing period start | Invoice master data: invoices.DDF_Billing_Period_Start |
| BT-74 | Invoicing period end | Invoice master data: invoices.DDF_Billing_Period_End |
Laatste wijziging: 21.08.2026
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