Notarial certification and authentication are frequently confused -- yet these two forms of notarial involvement differ considerably in terms of effort, cost and legal consequences. Learn when each form is required and what consequences the wrong choice may have.
Notarial Authentication of Signatures: When Is Authentication Sufficient Instead of Certification?
In daily legal and business practice, you regularly encounter situations requiring notarial involvement. Many clients ask themselves: does my document need to be notarially certified, or is authentication of the signature sufficient? The answer has significant implications for the effort, costs and -- in the worst case -- the validity of your legal transaction. This article provides a systematic overview of the differences and helps you to determine the correct form with confidence.
Terminology: Two Different Procedures
Notarial certification and signature authentication are two fundamentally different procedures that fulfil different functions and are based on different statutory provisions.
Notarial certification (§ 128 BGB):
In the case of certification, the notary draws up a record of the entire content of the legal transaction. The procedure comprises:
- Duty to advise: the notary must advise the parties on the legal implications of the transaction and ascertain the intentions of the parties.
- Duty to read aloud: the entire deed is read aloud to the parties.
- Approval endorsement: the parties approve the record by signing it.
- Content review: the notary examines the substantive legality and fairness of the transaction.
Signature authentication (§ 129 BGB):
In the case of authentication, the notary's role is limited to confirming the genuineness of the signature. This means:
- The notary confirms that the signature originates from the stated person.
- The notary verifies the identity of the signatory (identity card, passport).
- A substantive review or advice on the content of the document does not take place as a general rule.
- The notary appends an authentication endorsement beneath the signature.
When Is Certification Mandatory?
The law prescribes notarial certification for legal transactions where there is a particular need to protect the parties or a public interest in legal certainty.
Typical cases requiring certification:
- Real estate transactions (§ 311b Abs. 1 BGB): contracts for the acquisition or disposal of land, heritable building rights and condominiums
- GmbH formation (§ 2 Abs. 1 GmbHG): the articles of association of a GmbH require notarial certification
- Transfer of GmbH shares (§ 15 Abs. 3 GmbHG): the assignment of GmbH shares
- Marital agreements (§ 1410 BGB): agreements on the matrimonial property regime
- Inheritance contracts (§ 2276 BGB): contractual dispositions upon death
- Promises of gifts (§ 518 Abs. 1 BGB): the promise of a gift (not the manual gift)
- Obligation to transfer one's entire assets (§ 311b Abs. 3 BGB)
When Is Signature Authentication Sufficient?
Authentication is sufficient where the law merely prescribes the formal requirement of public authentication or where a register requires the authenticated form.
Typical cases where authentication suffices:
- Commercial register filings (§ 12 HGB): filings with the commercial register, for example upon change of managing director, relocation of seat or grant of general commercial power of attorney
- Land registry declarations: certain declarations to the land registry, e.g. consents to cancellation of land charges or priority notices of conveyance
- Association register filings (§ 77 BGB): filings with the register of associations
- Powers of attorney: where a power of attorney is granted for a transaction subject to formal requirements, authentication of the signature on the power of attorney document generally suffices
- Shareholders' lists (§ 40 GmbHG): the shareholders' list to be filed with the commercial register
- Affirmations in lieu of oath: in certain judicial or administrative proceedings
Cost Differences Under the GNotKG
The fee differences between certification and authentication are considerable, as different fee rates under the Court and Notary Costs Act (GNotKG) apply.
Certification:
- Base fee: 2.0 times the fee pursuant to KV Nr. 21100 GNotKG
- Calculated on the basis of the transaction value of the certified legal transaction
- Additionally: fees for drafting, supervision and execution
Authentication:
- Base fee: 0.2 to 0.5 times the fee (depending on the type of declaration)
- Significantly lower fees, as no advisory or drafting services are rendered
- For commercial register filings, often only a fraction of certification costs
Example calculation at a transaction value of EUR 500,000:
- Certification fee (2.0): approx. EUR 1,870 plus ancillary costs
- Authentication fee (0.2): approx. EUR 187 plus ancillary costs
The cost savings may be even greater at higher transaction values.
The Procedure at the Notary
Procedure for certification:
- Preparation: the notary prepares a draft deed on the basis of the information provided. This is sent to the parties in advance for review (for consumer contracts in real estate law: at least two weeks before the appointment).
- Certification appointment: verification of identity, reading aloud of the deed, discussion and advice, approval and signature by all parties and the notary.
- Follow-up: obtaining required approvals, register filings, execution in the land registry.
Procedure for authentication:
- Preparation: the document to be signed is prepared by the client or their advisor.
- Authentication appointment: verification of identity, signature before the notary, application of the authentication endorsement.
- Duration: generally only a few minutes.
Legal Consequences of Choosing the Wrong Form: Formal Invalidity
The consequences of a formal defect are severe. Pursuant to § 125 BGB, a legal transaction that lacks the form prescribed by law is void. This means:
- No cure through performance: the mere execution of the transaction does not cure the formal defect as a general rule (exception: § 311b Abs. 1 Satz 2 BGB for real estate transactions following conveyance and registration).
- Unwinding: benefits already rendered must be returned under the law of unjust enrichment.
- No enforceability: claims arising from the formally invalid contract cannot be enforced in court.
Practical example: if a GmbH share purchase agreement is concluded only with an authenticated signature rather than notarial certification, the entire contract is void -- even if the purchase price has already been paid and the shareholders' list has been amended.
Comparison Table: Certification vs. Authentication
- Content review: Certification: Yes, comprehensive -- Authentication: No
- Duty to advise: Certification: Yes -- Authentication: No (only duty to warn in case of obvious defects)
- Identity verification: Certification: Yes -- Authentication: Yes
- Duty to read aloud: Certification: Yes -- Authentication: No
- Costs: Certification: Higher -- Authentication: Significantly lower
- Time required: Certification: 30 minutes to several hours -- Authentication: A few minutes
- Protective function: Certification: Warning, advice, evidence -- Authentication: Identity verification only
Tips for Determining the Correct Form
- Check the statutory text: look in the relevant provision for the words "notarial certification" or "public authentication". The wording is decisive.
- When in doubt, choose the stricter form: certification always satisfies the formal requirement of authentication as well (argumentum a maiore ad minus). The reverse does not apply.
- Seek expert advice: in complex transactions or cases of doubt, consultation with the notary or a specialised legal advisor is essential.
- Watch for chain references: sometimes the formal requirement only emerges from a reference to another provision. Check the complete chain of references.
Conclusion
The distinction between notarial certification and signature authentication is of fundamental importance for the validity of your legal transactions. While certification offers comprehensive protection through advice, content review and documentation, authentication is limited to identity verification -- but is faster and more cost-effective in return. The wrong choice may render the entire transaction void. At compleneo, we are happy to advise you on the required form and guide you through the notarial process -- so that your legal transactions rest on a solid foundation.
