Invoicing a German federal authority? It needs an XRechnung, and the Leitweg-ID the authority gave you decides where it lands. aiDoks creates the XRechnung for free — from a form or a PDF — puts the Leitweg-ID in the right field, and checks it against the official KoSIT rules. You download the file and upload it in the federal invoice portal OZG-RE or the portal the authority names. No accounting software needed.
Fill in the form or upload a PDF, scan or photo and let AI fill it in. Enter the authority's Leitweg-ID as the Buyer reference and add the seller contact details XRechnung requires. Saved customers, products and templates speed up the next one.
Before download the invoice is checked against EN 16931 and the German BR-DE rules of XRechnung 3.0, with errors explained in plain language. You get the XRechnung XML file plus a PDF copy for your records.
For federal authorities, sign in to OZG-RE — for example with Mein Unternehmenskonto (ELSTER) — and upload the XRechnung. The Leitweg-ID routes it to the right office. For a state or municipal authority, use the portal or channel it names.
Each public buyer has a Leitweg-ID. In an XRechnung it belongs in the Buyer reference (BT-10) — a missing or wrong one is the most common reason an authority cannot process the invoice. Ask the authority for it.
The federal ZRE portal was switched off on 19 September 2025; federal invoices now go through OZG-RE, run by Bundesdruckerei. It takes an uploaded XRechnung, a web form, e-mail and Peppol.
XRechnung is the German version of EN 16931. aiDoks writes it in UBL and checks the BR-DE rules, such as the Leitweg-ID and the seller contact. A PDF is not an XRechnung, and ZUGFeRD only works where the authority explicitly accepts it.
Between companies the rules differ: everyone must be able to receive e-invoices since 1 January 2025, and issuing becomes mandatory in 2027 and 2028. The same XRechnung works for B2B, and the free viewer reads the ones you receive.
Received an XRechnung and cannot read it? The free viewer opens any XRechnung, ZUGFeRD or Peppol invoice as a readable PDF.
Yes. The free plan covers 6 e-invoices a month, and Pro (€4.85 a month) is unlimited. Validating and viewing XRechnung files is free.
In the Buyer reference field (BT-10). The authority gives you its Leitweg-ID; without it the invoice usually cannot be routed. The validation flags a missing Buyer reference before you download.
Sign in to OZG-RE, the federal invoice portal run by Bundesdruckerei — for example with Mein Unternehmenskonto (ELSTER) — and upload the XML file. OZG-RE also takes a web form, e-mail and Peppol. The old ZRE portal was switched off on 19 September 2025.
Each state sets its own rules and portal; many municipalities take XRechnung by their own portal, e-mail or Peppol. The authority tells you the channel together with its Leitweg-ID.
Yes. Upload the PDF, a scan or a photo; AI fills in the invoice form, you check the fields and download a validated XRechnung.
Only where the authority explicitly accepts it. XRechnung is the safe choice for public buyers; aiDoks creates both and can convert between them.
Create or convert, check, download — then upload it in OZG-RE.