What the status means
- Required by law
- The law prescribes registered mail, sometimes as one of a short list of accepted methods. Another channel can make the letter invalid.
- Recommended
- No form is prescribed, but a deadline or the need to prove receipt makes registered mail the usual safe choice.
- Often required by contract
- The law sets no form. Contract terms often ask for registered mail, so check yours.
- Not needed
- Email, an online form or a cancellation button is valid and common. Registered mail adds little.
All letters at a glance
| Letter | Status |
|---|---|
| Tenant's notice to end a lease | RecommendedHand-signed original |
| Landlord's notice to end a lease | RecommendedHand-signed original |
| Reply to a rent increase | Not needed |
| Reclaiming the rent deposit | Recommended |
| Notice of defects to the landlord | Recommended |
| Resignation by the employee | RecommendedHand-signed original |
| Dismissal by the employer | RecommendedHand-signed original |
| Cancelling an insurance policy | Not needed |
| Cancelling a mobile or internet contract | Not needed |
| Cancelling a gym membership or subscription | Not needed |
| Cancelling an electricity or gas contract | Not needed |
| Switching statutory health insurer | Not needed |
| Payment reminder for an unpaid invoice | Recommended |
| Disputing a debt collection claim | Recommended |
| Objection to a tax assessment | Not needed |
| Objection to a decision of the Jobcenter, a health insurer or the pension insurance | RecommendedHand-signed original |
| Appeal against a fine notice | Recommended |
| Withdrawal from an online or doorstep purchase | Not needed |
| Defect complaint under the legal guarantee | Recommended |
Housing and rent
Tenant's notice to end a lease
The notice must be on paper and signed by hand by every tenant; email, fax or a scanned letter is not valid. What counts is when the landlord receives it, so keep proof of delivery – registered mail is allowed but not required.
The law asks for a letter signed by hand. The issue is the hand-signed original, not the registered letter: a printed or scanned signature does not meet that form.
- Deadline
- Three months; it must arrive by the third working day of a month for that month to count.
- Other valid ways
- Hand delivery against a signed receipt, or delivery to the letterbox by a messenger who has read the letter.
- Sources
- Gesetze im Internet, § 568 BGB Form und Inhalt der KündigungGesetze im Internet, § 573c BGB Fristen der ordentlichen KündigungVerbraucherzentrale, Einschreiben – der Brief fürs WichtigeLegal basis: §§ 568 Abs. 1, 126, 573c Abs. 1, 130 BGB
Landlord's notice to end a lease
The notice needs a hand-signed original, must state the reasons and must be addressed to every tenant. The landlord has to prove it arrived; a copy by email or fax is not enough.
The law asks for a letter signed by hand. The issue is the hand-signed original, not the registered letter: a printed or scanned signature does not meet that form.
- Deadline
- Three to nine months depending on how long the tenancy has run, received by the third working day of the month.
- Other valid ways
- Hand delivery in front of a witness, or delivery by a messenger or a bailiff.
- Sources
- Gesetze im Internet, § 568 BGB Form und Inhalt der KündigungGesetze im Internet, § 126 BGB SchriftformVerbraucherzentrale, Einschreiben – der Brief fürs WichtigeLegal basis: §§ 568, 573, 573c, 126 BGB
Reply to a rent increase
The tenant's consent has no prescribed form. If you do not agree, you need not send anything; the landlord may then go to court to seek consent.
- Deadline
- By the end of the second calendar month after the request arrived.
- Other valid ways
- Agree by letter, email, or by signing the form the landlord enclosed.
- Sources
- Gesetze im Internet, § 558b BGB Zustimmung zur MieterhöhungGesetze im Internet, § 558a BGB Form und Begründung der MieterhöhungLegal basis: §§ 558a, 558b BGB
Reclaiming the rent deposit
There is no prescribed form, but if you set the landlord a deadline and later want interest or costs, you need to prove the demand arrived.
- Deadline
- The claim usually expires three years after the end of the year it fell due; the landlord may take a reasonable time to check first.
- Other valid ways
- Email or ordinary letter, if the landlord confirms receipt.
- Sources
- Gesetze im Internet, § 551 BGB Begrenzung und Anlage von MietsicherheitenGesetze im Internet, § 286 BGB Verzug des SchuldnersLegal basis: §§ 551, 286, 195, 199 BGB
Notice of defects to the landlord
Tenants must report defects promptly, otherwise they lose the right to reduce the rent and may be liable for further damage. No form is prescribed, but proof of the notice protects you in a dispute.
- Deadline
- Without delay, as soon as the defect becomes apparent.
- Other valid ways
- Email or letter with photos; in urgent cases also phone straight away.
- Sources
- Gesetze im Internet, § 536c BGB Mängelanzeige durch den MieterLegal basis: §§ 536, 536c BGB
Work
Resignation by the employee
A resignation is only valid as a hand-signed original; email, fax, a scan, an electronic signature or a message in an HR portal is not enough. The notice period runs from receipt, so handing it over against a receipt is usually safer than the post.
The law asks for a letter signed by hand. The issue is the hand-signed original, not the registered letter: a printed or scanned signature does not meet that form.
- Deadline
- By law four weeks to the 15th or the end of a month, unless the contract or a collective agreement says otherwise.
- Other valid ways
- Hand over the original against a signed receipt on a copy, or have a messenger who acts as witness put it in the letterbox.
Dismissal by the employer
A dismissal needs a hand-signed original. The employer must prove it arrived, and the Federal Labour Court no longer treats a letterbox registered letter with tracking and delivery record as sufficient proof on its own.
The law asks for a letter signed by hand. The issue is the hand-signed original, not the registered letter: a printed or scanned signature does not meet that form.
- Deadline
- The employee has three weeks from receipt to bring an unfair dismissal claim.
- Other valid ways
- Hand delivery in front of a witness, or delivery by a messenger who knows the content and records the drop-off.
Insurance and subscriptions
Cancelling an insurance policy
For consumer contracts made since October 2016, the terms may not require more than text form, so an email is enough. The notice must arrive in time, so ask for written confirmation; if the deadline is close, registered mail adds a safety net.
- Deadline
- Usually one month before the end of the insurance year, at most three months; for car insurance often by 30 November.
- Other valid ways
- Email, fax, the customer portal or a letter; a signature is usually not needed.
- Sources
- Gesetze im Internet, § 11 VVG Verlängerung, KündigungGesetze im Internet, § 309 BGB KlauselverboteVerbraucherzentrale, Kündigung per E-Mail: Darauf sollten Sie achtenLegal basis: § 11 VVG; § 309 Nr. 13 BGB; § 126b BGB
Cancelling a mobile or internet contract
If a contract can be taken out online, the provider must offer an online cancellation button and send an immediate confirmation. Text form is enough; registered mail is not needed.
- Deadline
- After the minimum term, at any time with one month's notice.
- Other valid ways
- The cancellation button on the provider's website, email or the customer portal.
- Sources
- Gesetze im Internet, § 56 TKG Vertragslaufzeit, KündigungGesetze im Internet, § 312k BGB Kündigung von Verbraucherverträgen im elektronischen GeschäftsverkehrLegal basis: § 56 TKG; § 312k BGB; § 309 Nr. 13 BGB
Cancelling a gym membership or subscription
Standard terms may not require more than text form or a special delivery method such as registered mail. Contracts that can be taken out online must also offer a cancellation button with immediate confirmation.
- Deadline
- For newer contracts, cancellable monthly after the minimum term; otherwise the agreed notice period applies.
- Other valid ways
- Cancellation button, email or letter; no signature needed.
- Sources
- Gesetze im Internet, § 309 BGB KlauselverboteGesetze im Internet, § 312k BGB KündigungsbuttonVerbraucherzentrale, Kündigung per E-Mail: Darauf sollten Sie achtenLegal basis: § 309 Nr. 9 und Nr. 13 BGB; § 312k BGB
Cancelling an electricity or gas contract
Text form is enough and the supplier must confirm the cancellation. Registered mail adds little.
- Deadline
- Two weeks for the default supply tariff; the agreed period for other contracts.
- Other valid ways
- When switching, the new supplier usually cancels for you; otherwise email, the cancellation button or a letter.
- Sources
- Gesetze im Internet, § 20 StromGVV KündigungBundesnetzagentur, Vertragsarten Strom und GasLegal basis: § 20 StromGVV / § 20 GasGVV; § 312k BGB
Health insurance
Switching statutory health insurer
Since 2021 you no longer cancel with your old insurer yourself. The new insurer reports the switch electronically and the old one confirms the end of membership.
- Deadline
- Possible after twelve months of membership; it takes effect at the end of the second following month.
- Other valid ways
- Join the new insurer online or on paper; the old insurer is informed electronically.
Money and debts
Payment reminder for an unpaid invoice
A reminder has no prescribed form. It does put the debtor in default, though, and the creditor must be able to prove it arrived; without a reminder, consumers are only in default 30 days after an invoice that says so.
- Other valid ways
- Email or ordinary letter; later, the court payment order procedure can be started online.
- Sources
- Gesetze im Internet, § 286 BGB Verzug des SchuldnersVerbraucherzentrale, Einschreiben – der Brief fürs WichtigeLegal basis: § 286 BGB
Disputing a debt collection claim
Disputing a collection letter has no prescribed form, but proof shows later that you contested the claim in time. A court payment order is different: only a timely objection filed with the court counts.
- Deadline
- Two weeks from service if a court payment order arrives.
- Other valid ways
- Email to the collection agency and the original creditor; against a court payment order, only with the enclosed form or online.
Tax and fines
Objection to a tax assessment
The objection may be filed in writing or electronically; no handwritten signature is needed, as long as it is clear who is filing. Elster gives a receipt.
- Deadline
- One month from when the assessment is deemed delivered.
- Other valid ways
- Via Elster, by email, by letter, or orally on record at the tax office.
- Sources
- Gesetze im Internet, § 357 AO Einlegung des EinspruchsGesetze im Internet, § 355 AO EinspruchsfristLegal basis: §§ 355, 357 AO
Objection to a decision of the Jobcenter, a health insurer or the pension insurance
The objection must be in writing with a handwritten signature, made on record at the office, or sent through an approved digital channel; a plain email or a letter with a printed signature is not enough. It must reach the office that issued the decision within one month. Registered mail is allowed, but social courts do not always accept the postal record as proof; a confirmation of receipt from the authority is safer.
The law asks for a letter signed by hand. The issue is the hand-signed original, not the registered letter: a printed or scanned signature does not meet that form.
- Deadline
- One month from notification; a decision sent by post counts as notified on the fourth day after posting. Three months if notified abroad.
- Other valid ways
- Handing it in at the office against a date stamp on a copy, making the objection on record there, a classic fax of the signed original, or an approved digital channel of the authority.
- Sources
- Gesetze im Internet, § 84 SGG WiderspruchsfristGesetze im Internet, § 37 SGB X Bekanntgabe des Verwaltungsaktesbetanet, Widerspruch im SozialrechtLegal basis: § 84 SGG, § 37 SGB X
Read our guide: Objection to a decision of the Jobcenter, a health insurer or the pension insurance
Appeal against a fine notice
The appeal must reach the authority in writing or on record, within a short deadline. A plain email is often not accepted, so a letter with proof of delivery or a fax is the usual safe route.
- Deadline
- Two weeks from service of the notice; what counts is when the authority receives it.
- Other valid ways
- Fax, delivery in person, or a statement on record at the authority; email only if the authority offers an approved electronic channel.
- Sources
- Gesetze im Internet, § 67 OWiG Form und Frist des EinspruchsLegal basis: § 67 OWiG; § 110a OWiG
Consumer purchases
Withdrawal from an online or doorstep purchase
Withdrawal needs no particular form but must be clear; just returning the goods without a statement is not enough. Since June 2026, online shops must offer a withdrawal function and confirm receipt immediately.
- Deadline
- 14 days, usually from receiving the goods; sending it in time is enough.
- Other valid ways
- The withdrawal function in the online shop, email, letter or the model withdrawal form.
- Sources
- Gesetze im Internet, § 355 BGB Widerrufsrecht bei VerbraucherverträgenGesetze im Internet, § 356a BGB WiderrufsfunktionLegal basis: §§ 355, 356, 356a BGB
Read our guide: Withdrawal from an online or doorstep purchase
Defect complaint under the legal guarantee
A complaint needs no particular form. If you set the seller a deadline to repair or replace before withdrawing or reducing the price, you should be able to prove the deadline reached them.
- Deadline
- Claims usually expire two years after delivery.
- Other valid ways
- Email or letter with proof of purchase and photos.
- Sources
- Gesetze im Internet, § 437 BGB Rechte des Käufers bei MängelnGesetze im Internet, § 438 BGB Verjährung der MängelansprücheLegal basis: §§ 437, 438, 439, 323 BGB
FAQ
Which letters must be sent by registered mail in Germany?
None of the letters listed here has to go by registered mail by law. It is the usual safe route when a deadline runs from receipt or you must prove delivery, for example a payment reminder, a defects notice, a deposit claim or an appeal against a fine notice.
Is registered mail enough to end a lease or a job in Germany?
Not on its own. These notices need a hand-signed original; email, fax or a scan is not valid. The issue is the signature on paper, not how the letter travels. Many people hand the original over against a signed receipt, or use a messenger who has read the letter.
Can I cancel insurance, a phone contract or a gym by email?
Usually yes. Consumer contract terms may not ask for more than text form, and contracts that can be taken out online must offer a cancellation button with an immediate confirmation. Registered mail helps when the deadline is close and you want proof of delivery.
Does an Einschreiben Einwurf prove the letter arrived?
It records delivery into the letterbox. In 2025 the Federal Labour Court held that the posting receipt and the online status are not, on their own, prima facie proof of receipt. Keep every record you have.
Does registered mail prove what the letter said?
No. It records posting and delivery, not the text. If you must prove the contents, use for example a messenger who reads the letter before putting it in the letterbox.
Sources and review
Each letter links to the official source it is based on: legislation, a government portal or a public authority. Practice and court rulings can change; check the source before you rely on a deadline. Sources checked on 28 October 2026.
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