Activate X-invoice / E-invoice for Germany

E-invoicing simplifies the invoicing process, saves costs and time, and is increasingly becoming mandatory in the B2B sector. https://www.e-rechnung-bund.de/e-rechnung/merksatze-zur-erechnung/ Here you will find an overview of the input fields.

Activation of the e-invoice / X-invoice in your LDB

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.

Important, related Master Data Fields

On Customer Level

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 ID
customers.DDF_Seller_ID
Used for field BT-29 for e-invoices.

Email address of the buyer/recipient
customers. DDF_Buyer_Electronic_Address
Used for field BT-49 for e-invoices.
If this field does not exist, customers.email is used.

On Invoice Level

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 time
invoices.DDF_Delivery_Time
Used for field BT-72 for e-invoices.

Object reference
invoices.DDF_Object_Reference
Used for field BT-18 for e-invoices.

Document note
invoices.DDF_Document_Note
Used for field BT-22 for e-invoices.

Note

There are two permitted formats for e-invoices:

  • Universal Business Language (UBL)
  • UN/CEFACT Cross Industry Invoice (CII)

We support the CII format, but not the UBL format.

BT Field Overview

BT Code Meaning / Purpose (EN 16931) Field(s) in LDB
BT-10 Buyer reference
in Germany = Leitweg-ID
Customer master data: customers.DDF_Buyer_Reference
Mandatory 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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