The short answer: A shell company (Briefkastenfirma) and a virtual office are fundamentally different in legal terms. A shell company is a company with no real economic substance at its stated registered office, often set up for the purpose of concealment, and it can have consequences under tax law and criminal law. A virtual office is a lawful, legally valid (ladungsfähig) business address for a genuinely operating business that correctly states its actual place of management (Ort der Geschäftsleitung). The difference lies in substance and in honesty toward the tax office.
What you'll learn here
- What a shell company is in legal terms
- What a virtual office is and why it is legal
- Where exactly the legal line is drawn
- A direct comparison of the two models
- How to use a virtual office properly
What a shell company is
The German term "Briefkastenfirma" (literally "letterbox company") has no legal definition of its own. It is an umbrella term for companies that have no substantial economic activity at their stated registered office. The Federal Fiscal Court (Bundesfinanzhof) describes such a company as one that has been formally established at a location but does not carry out any business activity there, meaning it has no staff, business premises or equipment.
Put simply: There is a name on a door, but no real business behind it. This is often used to conceal where the company is really based or to shift taxes to a lower-tax location. That is exactly what makes this setup risky.
What a virtual office is
A virtual office is the opposite of a facade. Behind it is a business that really exists and has genuine business operations. The rented address is the company's official administrative and correspondence address: legally valid and connected to an active mailroom that receives, logs and forwards mail.
The business continues to work where it actually works, for example from a home office or at a client's site. The address protects the private home address and ensures a professional presence. This is common, legal practice.
Where the legal line is drawn
Two things are decisive: real substance and honesty about the place of management.
For tax recognition, Section 10 of the German Fiscal Code (AO) looks at the place of actual top-level management (geschäftliche Oberleitung), meaning where day-to-day business is run and key decisions are made. A company is only considered abusive under Section 42 AO if it is a purely artificial arrangement with no economic activity at all.
The line to a criminal offense is crossed when the registered office is moved only on paper (a sham registered office, or Scheinsitz) or when a location is declared as a permanent establishment (Betriebsstätte) that does not meet the requirements of Section 12 AO. This can be treated as tax evasion. So the crux of the matter is not the rented address itself, but whether you correctly state your real place of work to the tax office.
Note: This is a general overview, not legal or tax advice. If in doubt, clarify your situation with a tax advisor.
A direct comparison
Shell company
- No real business activity at the registered office
- No staff, no premises, no substance
- Often used to conceal where the company is really based
- Risk: sham registered office, Section 42 AO, tax evasion
Virtual office
- Real business with genuine operations
- Legally valid address with an active mailroom
- Protects your home address, lawful presence
- Actual place of management is stated correctly
How to use a virtual office properly
- Run a real business with genuine operations, no matter where you work from.
- State your actual place of management in the tax registration questionnaire (Fragebogen zur steuerlichen Erfassung).
- Use a genuinely legally valid address where mail is received and forwarded.
- See the address as your official mailbox and public presence, not as a way to conceal taxes.
If you stick to this, you are clearly on the legal side. A virtual office is a recognized solution for founders, freelancers and businesses that want to present themselves professionally and protect their privacy.
Which package is right for you?
Starter
from €4.99/month
c/o address for your imprint (legal notice) and invoices. For the self-employed and sole proprietors.
Pro
from €10.99/month
Like Starter, plus a daily scan service and free storage.
Expert
from €32.49/month
Fully legally valid address without "c/o", for a GmbH or UG with a registered office and commercial register entry.
Prices based on annual billing, as of June 2026. Check the pricing page for current prices.
A legitimate address in Berlin
The Geschäftsadressemieten.com address at Pappelallee 64, 10437 Berlin is a fully functioning mailroom in Prenzlauer Berg, not an anonymous mailbox. Mail is received daily, logged with a date-of-receipt stamp and scanned or forwarded on request. More than 1,000 customers use the address, and 97 percent would recommend it.
This gives you exactly what sets a virtual office apart from a shell company: a real, legally valid address with active mail handling. Set up in about five minutes, with no setup fee, and you can cancel monthly.
Conclusion: Substance and honesty make the difference
A shell company and a virtual office sound similar, but legally they are worlds apart. A shell company relies on an empty facade and can have serious consequences. A virtual office is the legitimate solution for a real business that simply outsources its address and states its place of work honestly. If you keep this in mind, you are using a completely legal and sensible solution.
A legally valid address, legitimate and above board
Secure your address nowNo setup fee · Cancel monthly · Live in 5 minutes
Frequently asked questions
Is a virtual office legal?
Yes. As long as there is a real business behind it and you correctly state your actual place of management, a virtual office is a recognized, legal solution.
Is a shell company illegal?
Not automatically, but it is risky. If there is no economic substance at all, or if the registered office is moved only on paper (sham registered office, Scheinsitz), this can be treated as an abuse of legal arrangements (Gestaltungsmissbrauch) under Section 42 AO or as tax evasion.
What is the most important difference?
Substance. Behind a virtual office there is a real business with genuine operations; behind a shell company there is not.
What do I need to watch out for with the tax office?
Always state your actual place of management in the tax registration questionnaire if you don't work at the rented address. This information is only for the tax office and must be truthful.
