Module 6 of 22

Available

E-invoicing without headaches: receive, check and send compliant by the deadline

Receive, validate and send electronic invoices in the EN16931, EXTENDED and XRECHNUNG formats. You get a dedicated email mailbox per tenant, an AI helper for validation and an approval inbox with a four-eyes principle. Everything is GDPR-compliant and EU-hosted at Hetzner Nuremberg, for 49 € net/user/month all-in.

What E-Invoice does

Formats EN16931, EXTENDED and XRECHNUNG
DARION-AI generates and reads the three formats that matter for German and European B2B invoices: EN16931 as the European standard, EXTENDED for ZUGFeRD profiles with extended business data, and XRECHNUNG as the mandatory format for public-sector recipients in Germany. For each outgoing invoice you choose the profile yourself or let DARION-AI decide automatically based on the recipient. The XML validation runs against the official Schematron rules, and any errors are marked directly in the document and explained in plain language. Hybrid PDFs with embedded XML are generated correctly, so suppliers and customers can either open the human-readable view or process the XML automatically. We maintain version updates of the Schematron rules centrally, which means you don't have to follow up yourself when KoSIT releases new validation rules.
Approval inbox with four-eyes principle
Incoming e-invoices land in a central approval inbox where you see supplier, amount, due date and automatically extracted purchase order references at a glance. Depending on amount threshold and cost center, approvals run either via the four-eyes principle or through multi-step workflows. Comments, queries and rejections are documented right in the document, and the audit trail later shows completely who approved what and when. You store substitute rules for vacation and sickness per approver, and DARION-AI reroutes automatically. Escalation notifications for overdue approvals go out via email or push to the deputy. Mobile approval via the app works for amounts up to the approver's personal limit, so you no longer delay early-payment discount deadlines just because you're on the road without a laptop.
Dedicated email mailbox per tenant
Each tenant gets its own email mailbox ([email protected] or your own domain) which DARION-AI connects directly. Incoming PDFs and XML attachments are recognised automatically, assigned to the tenant and handed over to the e-invoice pipeline. Suppliers don't have to change anything: they simply keep sending to the familiar email address, and you receive the invoice in structured form in DARION-AI. Spam, dunning and non-invoice mails are sorted out by the AI helper but remain available in the mailbox. Mailbox access is tenant-separated by Postgres Row-Level Security and physically isolated. The outgoing mailbox for outbound invoices is multi-tenant capable as well, so recipients can reply and the conversation lands at the document.
AI helper for checking and account assignment
The AI helper checks every incoming e-invoice for plausibility, compares the amount with the order and the goods receipt, and suggests the journal entry, account and cost center. It learns from your corrections and is Qwen3-based and self-hosted in the EU, with no data outflow to third countries. Anomalies such as unusual amounts, new IBANs or duplicate invoices are marked directly in the approval inbox. For recurring suppliers the helper recognises patterns and, once you confirm, takes over journal entry and cost center automatically. After 50 approved documents per supplier, about 80 percent of the suggestions can be accepted directly. You stay in control: auto-booking only runs when you explicitly enable it per supplier.
GoBD- and eIDAS-compliant archiving
All e-invoices are stored GoBD-compliant and unchangeable, with an audit trail, access logs and the statutory retention period of ten years. An optional qualified electronic signature under eIDAS is available for invoices that have to be sent signed, for example to public-sector recipients or for foreign invoices. When the tax inspector comes, you export the requested period in two clicks as an IDEA-compliant Z3 data carrier including the index file. The original file (XML or hybrid PDF) is delivered together with the validation report and the approval history, so the audit can be reconstructed completely. Deletion holds for ongoing proceedings or legal disputes are set per document, and DARION-AI respects the hold even beyond the end of the retention period.
Sending via PEPPOL and email
You send outgoing e-invoices via the PEPPOL network to connected recipients or as an XML/PDF hybrid via email. DARION-AI is connected as a PEPPOL Access Point and your tenant ID is set up at onboarding, so you don't have to register yourself. Status messages (delivered, accepted, rejected) flow back directly into the document, which means you don't have to keep checking the outbox. For recipients without a PEPPOL connection, DARION-AI recognises this automatically and sends the hybrid PDF via email with a read receipt. Returns and bounces land in a separate follow-up list where you can process them in a structured way. Cancellation and correction invoices are correctly chained and reported back to the recipient.

Who uses this module

CEO
You have to prepare for the staggered B2B obligation 2027/2028: receiving from 2025, issuing for large companies from 2027 and for everyone from 2028. DARION-AI handles the transition rules for you. Receiving via the tenant-specific mailbox runs immediately, and you enable outgoing sending step by step per business partner. In the dashboard you see the rate of incoming e-invoices, open approvals and the suppliers that are still sending PDFs, nicely prepared for the next management meeting. The AI helper answers questions like 'Which suppliers didn't send an e-invoice in April?' directly in the chat. For auditors and tax inspections you export the GoBD data carrier in two clicks. And you save the investment in an external e-invoicing provider, because everything is included in DARION-AI's 49 € net/user/month.
Team lead
As accounting lead you steer the approval inbox. Incoming invoices are automatically assigned to the right clerk, whether by supplier, cost center or amount threshold. You see the queue live, can escalate and approve as a deputy. For each supplier you see the historical amounts, and the AI helper marks outliers and duplicate invoices before they get approved. Before the month-end close you export all approved e-invoices GoBD-compliant to the tax advisor, either as DATEV-CSV or directly into their system. Complaints to suppliers you write from within DARION-AI, and the mail history hangs at the document. Early-payment discount deadlines are monitored automatically, so you get push notifications for invoices that would lose their discount window in the next three days.
Employee
You're a clerk and check incoming invoices daily. In the approval inbox you only see the documents assigned to you. Supplier, purchase order reference, goods receipt and the AI suggestion sit right at the document, so you simply click approve or correct. For queries you write the comment to the supplier directly from DARION-AI: the dedicated email mailbox sends it automatically and the conversation lands at the document. No Excel list, no PDF shuffling via mail. For unclear cases you mark the document with a note and return it to the team lead. Mobile approval via the app works for amounts up to your personal limit. And when you're unsure, the AI helper assists with a plausibility check. You ask the question, you get the answer, and there's no need to call the tax advisor. Recurring suppliers you recognise immediately in the preview, and for new suppliers DARION-AI shows you the bank details in the context of the previous order, so you don't accidentally transfer money to a fake IBAN.

Connects with

DATEVLexwareSevdeskMicrosoft 365PEPPOL

Frequently asked questions

Ready for DARION-AI E-Invoice?

49 € net/user/month with all modules included

Other modules in this area