Guide · Section 123 AO
Authorised recipient for the German tax office (Empfangsbevollmächtigter, § 123 AO)
By PortoDoc · Updated · 8 min read

An authorised recipient receives the tax office's letters for you in Germany. If your company is based outside the EU and the EEA, the tax office can ask for one (§ 123 AO); marketplace sellers name one when they register. The letters are in German; many set a deadline.
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What does § 123 AO say word for word?
- Who: anyone without a residence, habitual abode, seat or management in Germany, the EU or the EEA (sentence 1).
- When: when the tax office asks, within a reasonable period (sentence 1).
- Where: the authorised recipient must be in Germany (sentence 1).
- Warning first: the tax office must tell you what happens if you name nobody (sentence 4).
What happens if you name nobody?
If you name nobody after the request, sentence 2 applies: a letter to you counts as delivered one month after it was posted, and an electronic document on the fourth day after it was sent, unless it is established that it arrived later or not at all (sentence 3).
From that day on, deadlines run. You can only object to an assessment within one month after it was notified to you (§ 355 AO).
Estimates and surcharges can follow. If returns are missing, the tax office may estimate your tax (§ 162 AO). An unnoticed letter can therefore lead to an estimated assessment or a late filing surcharge (§ 152 AO).
How PortoDoc solves it
- 01Address: You sign up and get your postal address in Ahrensburg near Hamburg with your personal PD number. It is a delivery address for letters, not a business, registered-office or imprint address.
- 02Naming us: You sign the power of attorney that includes § 123 AO. Under “For the tax office”, your account shows exactly what to enter. You name PortoDoc to the tax office yourself, for example in the VAT registration form.
- 03Scan: The tax office writes to us. We scan each letter and you get a notification. The letter appears in your account as a PDF.
- 04AI summary: Every plan includes an English AI translation; depending on your plan, you also get an AI summary: non-binding aids, not tax advice; the original letter counts.
- 05Your reply: You or your tax adviser reply to the tax office. We do not file returns, give tax advice or monitor deadlines.
PortoDoc is operated by Postuvio UG (haftungsbeschränkt), Am Tiergarten 10-12, 22926 Ahrensburg, Germany. Letters arrive in Ahrensburg (Schleswig-Holstein); data is stored on servers in the EU (Hetzner, Finland).
Common questions
Where do I find an authorised recipient, and who can be one?
Any person or company with an address in Germany that you trust with your post, for example a tax adviser or a mail service such as PortoDoc. § 123 AO only requires an authorised recipient in Germany.
Is a virtual address or a PO box in Germany enough?
An address alone is not enough. The tax office needs a person or company that you have authorised and named. Ask the provider of your address whether they take on this role; with PortoDoc, this works with the power of attorney under § 123 AO.
Do I need an expensive fiscal representative?
Usually not. Under § 22a UStG, a fiscal representative is only for businesses that make exclusively tax-exempt sales in Germany and cannot deduct input tax. A typical seller with stock in a German warehouse does not fall under this.
A German letter demands tax, but I hardly sell in Germany. Is it a scam?
It can be a real estimated assessment: if returns are missing, the tax office may estimate the tax (§ 162 AO). Compare sender, tax number and bank details with the details on the tax office's official website. You can object to an assessment within one month (§ 355 AO).
Do I have to wait until the tax office asks for one?
No. You can also name one yourself, for example right away in the VAT registration form. Marketplace sellers based outside the EU and the EEA must even do so with the registration (§ 22f (1) sentence 2 UStG).
Does the authorised recipient file my VAT returns?
No. An authorised recipient receives letters. Filing returns is a separate service, usually provided by a tax adviser or a VAT service provider.
Next step
GUIDES · 7 MIN READ
German VAT registration form for non-resident businesses: how to fill in the authorised recipient section →
Field by field through the authorised recipient section of the German VAT registration form: what to enter, typical mistakes and an example.
PortoDoc is your authorised recipient in Germany.
We receive your tax office letters in Ahrensburg near Hamburg, scan them and send you a notification; the address is not a business, registered-office or imprint address. Every plan includes an English AI translation; depending on your plan, you also get an AI summary: non-binding aids, not tax advice; the original letter counts. Starter costs €19.95 a month; if you pay monthly, you can cancel at the end of any month.
Sources and legal basis
- § 123 AO (German Fiscal Code, wording)
Show legal text (German original)
„Ein Beteiligter ohne Wohnsitz oder gewöhnlichen Aufenthalt, Sitz oder Geschäftsleitung im Inland, in einem anderen Mitgliedstaat der Europäischen Union oder in einem Staat, auf den das Abkommen über den Europäischen Wirtschaftsraum anwendbar ist, hat der Finanzbehörde auf Verlangen innerhalb einer angemessenen Frist einen Empfangsbevollmächtigten im Inland zu benennen. Unterlässt er dies, so gilt ein an ihn gerichtetes Schriftstück einen Monat nach der Aufgabe zur Post und ein elektronisch übermitteltes Dokument am vierten Tage nach der Absendung als zugegangen. Dies gilt nicht, wenn feststeht, dass das Schriftstück oder das elektronische Dokument den Empfänger nicht oder zu einem späteren Zeitpunkt erreicht hat. Auf die Rechtsfolgen der Unterlassung ist der Beteiligte hinzuweisen.“
- § 355 AO
- § 162 AO
- § 152 AO
- § 22a UStG
- § 22f UStG
- § 80 AO (authorised representatives)
- § 1 UStZustV (responsible tax offices)
- Official filling-in notes for the form, German version 01.23 (Berlin Senate Department for Finance)
- Berlin Senate Department for Finance: VAT registration forms for businesses based abroad (German, English, French)
Last checked on · How we check our information
This guide explains the rules in general terms. It is not tax advice. For your individual situation, ask a tax adviser.