Lex Koller Notary Switzerland, Notary Requirements, Exemptions & Deal Checklist (2026)

Lex koller notary switzerland compliance sits at the centre of nearly every real estate transaction involving a foreign buyer, and in 2026 the stakes for getting it right remain high. The Federal Act on the Acquisition of Real Estate by Persons Abroad, commonly known as Lex Koller, determines whether a notary may lawfully certify a conveyance, whether a cantonal permit is required before a sale can proceed, and whether the land registry will accept the transfer for registration. This guide sets out, step by step, what notaries, foreign buyers, developers, family offices and lending banks need to verify, document and file to complete a compliant acquisition.

It reflects the continuing emphasis on anti-money-laundering obligations and ongoing notarial digitisation initiatives that are reshaping how compliance is evidenced. For deeper practice support, see Notary Services, Switzerland.

Executive summary: what lex koller notary switzerland compliance means for notaries and foreign buyers

Before any deal signature, a short diagnostic separates routine transactions from those that require a cantonal authorisation. The four checks below form the backbone of lex koller notary switzerland practice and should be completed before a notary opens the conveyance file.

• Permit trigger assessment. Determine whether the buyer is a “person abroad” and whether the property type (residential, holiday home, commercial or development land) brings the acquisition within the permit regime.
• Notarised buyer declaration. Obtain a signed declaration from the buyer confirming nationality, residency status, beneficial ownership and intended use of the property.
• AML and customer due diligence. Carry out due diligence on the buyer, verify the source of funds and screen beneficial owners, consistent with current reporting expectations.
• Registry filing and permit evidence. File the public deed with the competent cantonal land registry, supplying permit evidence or a documented exemption where applicable.

Each of these steps is expanded below, together with a canton comparison, enforcement risks and selected case law. The practical message for advisors is simple: a notary can only safely certify where the permit position has been confirmed in writing and the registry filing package is complete.

What is Lex Koller? Legal framework and who it applies to

Lex Koller is the common name for the Federal Act on the Acquisition of Real Estate by Persons Abroad (BewG / LFAIE). The statute restricts the ability of foreign persons to acquire Swiss real estate and subjects many acquisitions to a prior cantonal authorisation. Its policy objective is to limit foreign ownership of Swiss land, particularly residential property, while permitting commercial and genuinely business-related acquisitions under defined conditions. The official text and implementing ordinance are published on Fedlex, the federal legal database, and the Swiss Federal Office of Justice issues high-level guidance on how the regime operates in practice.

The Act turns on the concept of a “person abroad”. This generally captures foreign nationals without Swiss residence, persons domiciled outside Switzerland, and legal entities controlled by such persons. By contrast, Swiss nationals, and foreign nationals who hold the appropriate residence status and live in Switzerland, are typically treated as not being persons abroad for the purposes of a main-residence purchase. Because status is determinative, the notary’s first task in any lex koller switzerland transaction is to establish, with documentary evidence, where the buyer sits within these categories.

Key statutory tests: ownership, use and type of property

Three interlocking tests shape the analysis. First, the ownership and control test asks who ultimately owns or controls the acquiring party, direct ownership, beneficial ownership through corporate layers, and financing arrangements all feed into whether a buyer is a person abroad. Second, the use test examines what the property will be used for: a primary residence occupied by a resident buyer is treated very differently from a holiday home or a passive investment. Third, the property-type test distinguishes residential property, which is tightly controlled, from commercial and business premises, which are generally more accessible to foreign buyers who use them for a genuine economic activity.

These tests operate together rather than in isolation. A foreign-controlled company acquiring an office building for its own operations may fall outside the permit regime, while the same company acquiring an apartment block as an investment will usually require authorisation. The notary must map the facts against all three tests before advising whether the transaction can be certified without a cantonal permit. The governing article numbers and definitions should be confirmed against the official statute text on Fedlex at the time of each transaction, because the implementing ordinance is periodically updated.

The notary’s role under lex koller notary switzerland transactions

In Switzerland, the public notary is the officer who draws up and certifies the public deed required to transfer real property. Notarial organisation is a cantonal matter: some cantons have independent “free” notaries, others operate an official or mixed system, so the precise form of the office varies by canton. The notarised deed is the instrument that the land registry relies on to effect the change of ownership. Because the notary stands between the parties and the registry, the profession carries a gatekeeping function that is central to lex koller notary switzerland compliance.

The notary does not grant the cantonal permit, that is a matter for the competent cantonal authority, but the notary must have regard to the permit position before the deed is used to register the transfer.

In practical terms the notary’s duties run across the whole transaction. The notary verifies the identity of the parties and their capacity to contract, confirms title by reviewing the land registry extract, drafts the conveyance so that it accurately reflects the agreed terms, and records in the deed the parties’ declarations about their status under Lex Koller. The notary then submits the completed instrument, together with supporting evidence, to the cantonal land registry. Where a permit is required, the notary ensures that the application has been made and that the authorisation is in place or that registration is held pending it.

Notarial certificate for lex koller notary switzerland: required wording

A core element of the public deed in a cross-border acquisition is the record of the buyer’s declaration about their Lex Koller status. The wording should be unambiguous and should state the buyer’s nationality and domicile, confirm whether the buyer is a person abroad within the meaning of the Act, identify the beneficial owners of any corporate acquirer, and set out the intended use of the property. Where the parties rely on an exemption, the deed should identify the exemption and reference the supporting documents.

Notaries should follow current cantonal practice and association guidance on recommended wording rather than improvising. Because Switzerland’s notarial deeds are executed in the official language of the canton, the wording exists in German, French and Italian versions, and the correct linguistic version must be used for the canton in question. A certificate that records an incorrect or incomplete declaration can undermine the registration and expose the notary to professional liability.

AML and enhanced customer due diligence and their impact on notaries

Anti-money-laundering obligations have become an increasingly important feature of lex koller notary switzerland practice. Real estate is a recognised channel for illicit funds, and continuing attention to AML places emphasis on the notary’s due diligence. In practice this means verifying the identity of each party, identifying and verifying beneficial owners behind corporate structures, understanding and documenting the source of the purchase funds, and conducting enhanced due diligence where the buyer, the structure or the funding presents elevated risk. The precise scope of a notary’s statutory AML duties depends on the applicable cantonal and federal framework and should be confirmed against current law.

The move toward notarial digitisation reinforces this. Electronic identity verification, digital signatures on certain instruments and electronic submission to cantonal registries change how notaries evidence that these checks were performed. The practical effect is a more complete, time-stamped audit trail attached to each file, which both strengthens compliance and raises the standard against which a notary’s conduct is measured. Notaries should align their internal checklists with current association practice notes and Federal Office of Justice communications, retaining the documentary evidence that supports each declaration recorded in the deed.

When a canton permit is required and typical exemptions

The permit regime is triggered by the combination of buyer status and property type. As a working rule, a person abroad who acquires residential property that will not serve as their genuine main residence requires a cantonal authorisation. Holiday homes and secondary residences are subject to particularly strict controls, including cantonal and federal quotas and conditions on use and resale. By contrast, a person abroad who acquires commercial or business premises used for a genuine economic activity generally does not require a permit, provided the acquisition fits the statutory conditions.

Development land and agricultural land require careful handling. The characterisation of the land, and the buyer’s intentions for it, can move a transaction into or out of the permit regime, so notaries should not assume that undeveloped land is automatically outside Lex Koller. Where there is any doubt about the correct classification, the prudent course is to seek a ruling from the competent cantonal authority before the deed is certified.

Common exemption scenarios and the documentation required

A number of acquisitions are recognised as falling outside the permit requirement or as benefiting from a specific exemption. These commonly include the following, each of which should be supported by documentary evidence placed on the notary’s file:

• Acquisition by inheritance. A statutory heir who acquires property through succession is generally exempt, though continued holding may be subject to conditions where the heir has no close connection to Switzerland. The notary should retain the certificate of inheritance and succession documents.
• Transfers between spouses or registered partners. Acquisitions arising from matrimonial or partnership property arrangements are commonly treated as exempt, supported by the marriage or partnership documentation and any property agreement.
• Acquisition by resident buyers. A main residence acquired by a foreign national who holds the appropriate residence status and lives in Switzerland is generally outside the regime, supported by residence documents and proof of domicile.
• Certain commercial acquisitions. Premises used for a genuine business activity may be acquired without a permit, supported by evidence of the intended commercial use.
• Acquisitions between close relatives. Transfers to certain close family members may be exempt, supported by evidence of the family relationship.

The availability of each exemption depends on the precise facts and on the current statutory conditions, which should be confirmed against the official text. Where an exemption is relied upon, the notary records the basis for it in the deed and preserves the evidence so that the registry, and, if necessary, the cantonal authority, can see why no permit was obtained.

Step-by-step notary checklist for a Lex Koller transaction

The following granular checklist walks through a lex koller notary switzerland transaction from first instruction to post-closing filing. Canton-specific steps are flagged and should be verified against the relevant cantonal registry.

1. Open the file and identify the parties. Collect certified identity documents for each individual party. For corporate buyers, obtain the register extract, articles of association and the ownership chart identifying ultimate beneficial owners.
2. Establish buyer status under Lex Koller. Determine nationality, domicile and residence status. Obtain residence permits, proof of Swiss domicile or equivalent evidence where the buyer claims not to be a person abroad.
3. Classify the property. Obtain the land registry extract and confirm whether the property is residential, a holiday home, commercial premises, development land or agricultural land.
4. Run the permit-trigger analysis. Apply the ownership, use and property-type tests. Record the conclusion and, if a permit is required, identify the competent cantonal authority.
5. Perform AML and due diligence. Verify identity, identify beneficial owners, document the source of funds, screen the parties and escalate to enhanced due diligence where risk indicators are present.
6. Prepare the notarised buyer declaration. Draft the declaration recording the buyer’s Lex Koller status, beneficial ownership and intended use, in the correct cantonal language.
7. Arrange payment and escrow. Confirm the funding route and, for foreign buyers, put appropriate escrow or security arrangements in place with the lending or depositary bank.
8. Lodge the permit application where required. Submit the cantonal permit application with the supporting documents and await the authorisation, or structure the deed so that registration is conditional on it.
9. Execute the public deed. Certify the conveyance, ensuring the Lex Koller declarations and any exemption basis are correctly recorded.
10. File with the land registry. Submit the deed and supporting package, including permit evidence or documented exemption, and complete the post-closing filing and archiving.

Timeline and critical path

The critical path in a permit-triggering deal runs through three phases. In the pre-signing phase the notary completes identity, status, classification and AML checks and prepares the declarations; this phase should not be compressed, because errors here propagate through the whole transaction. The signing phase is the execution of the public deed. The registry phase is the submission and registration of the transfer, which depends on a complete package and, where applicable, on the permit being granted. Where a permit must be obtained, the overall timeline is driven by cantonal processing times rather than by the parties’ readiness, so early engagement with the cantonal authority is essential.

Bank escrow and security practices for foreign buyers

Cross-border transactions raise particular funding and security questions. Lending banks will typically require confirmation of the Lex Koller position before releasing funds, and escrow arrangements are commonly used to hold the purchase price until the permit is in place and registration is secured. For foreign buyers, the notary should coordinate with the bank so that the flow of funds, the source-of-funds documentation and the release conditions are aligned with both the AML checks and the permit timeline. This coordination reduces the risk of funds being released before the transaction is legally secure.

Canton variations and a permit-comparison template

Lex Koller is federal law, but it is implemented by the cantons, and cantonal practice varies significantly, particularly for holiday homes, where some cantons apply stricter conditions and quotas than others, and some tourist cantons grant holiday-home permits while others grant none. Processing times, the forms required and the designated authority all differ by canton. Notaries and advisors must therefore work from the authoritative cantonal registry source for the canton in which the property is located, rather than assuming uniform practice across Switzerland.

The template below shows the fields that advisors should populate from the official cantonal registry pages for each transaction. Cells that cannot be confirmed from an authoritative source should be marked for confirmation rather than estimated.

For deeper, canton-by-canton detail as it is published, see the forthcoming Lex Koller, canton permit guides.

How to escalate or obtain a faster decision

Where timing is critical, advisors should engage the competent cantonal authority as early as possible and submit a complete application, because incomplete filings are the most common cause of delay. Some cantons will indicate expected timelines or consider urgent matters, but no fast-track should be assumed. The most reliable way to compress the timeline is to ensure that every supporting document, identity, status evidence, beneficial ownership, intended use and source of funds, is in order before the application is lodged.

Common pitfalls, enforcement and remedies

Most problems in lex koller notary switzerland transactions stem from a small set of recurring errors. The most serious is proceeding without a required cantonal permit, which can render the acquisition legally ineffective and prevent registration. A second is an incorrect or incomplete declaration of status, which can invalidate the basis on which the registry acted. A third is inadequate AML due diligence, particularly a failure to identify beneficial owners or to document the source of funds, which exposes both the parties and the notary to regulatory consequences.

The consequences of a breach can be severe. Registration may be refused, and an acquisition made in contravention of the Act can be challenged, with potential outcomes including a legally ineffective transaction, restoration of the prior position, forced resale and, in some cases, criminal penalties. Because these remedies operate against the property and the parties, a defect discovered after closing can be considerably more costly than the diligence that would have prevented it.

Practical risk mitigation for notaries and buyers

Risk mitigation turns on documentation and sequencing. Notaries should resolve the permit position in writing before certifying, record the Lex Koller declarations precisely, and preserve the evidence that supports every exemption relied upon. Buyers should disclose their status and ownership structure fully and early, and should expect enhanced due diligence on their funds. Where the facts are genuinely uncertain, seeking a determination from the cantonal authority before signing is far cheaper than unwinding a completed transaction.

Practical examples and selected case law

The Federal Supreme Court has repeatedly addressed the consequences of acquisitions that breach Lex Koller, and its judgments are an authoritative guide to how courts treat permit violations and attempts to circumvent the regime. The judgments database maintained by the Federal Supreme Court is the correct source for the full text, docket numbers and decision dates of the relevant decisions, and advisors should cite the specific judgment applicable to the facts in hand rather than rely on general summaries.

In broad terms, the case law demonstrates that courts look through formal structures to the economic reality of who controls an acquisition and for what purpose, and that arrangements designed to disguise foreign control attract robust remedies. Where the court finds an unlawful acquisition, the consequences reflect the Act’s protective purpose and can reach the validity of the transaction itself. Because the application of these principles is fact-specific, each matter should be assessed against the current statutory text and the most directly relevant judgment.

Lessons for notaries

The practical lesson for notaries is that substance prevails over form. A technically correct deed will not cure a transaction whose economic reality offends the Act. Notaries should therefore probe ownership and control, test the stated intended use against the commercial reality, and decline to certify where the facts point to an attempt to evade the permit regime. Careful documentation of this analysis protects the notary and gives the registry and any reviewing court a clear record of the basis on which the deed was certified.

Next steps and resources for lex koller notary switzerland transactions

For authoritative sources, start with the official statute text and implementing ordinance on Fedlex, the Federal Office of Justice guidance on the permit process and competent authorities, and current association practice notes on deed wording and digitisation and AML practice. For enforcement precedent, consult the Federal Supreme Court judgments database, and for canton-specific forms and timelines, contact the competent cantonal land registry or authority. Advisors seeking a referral can use the Global Law Experts directory, and those looking for canton detail should watch for the Lex Koller, canton permit guides, the Lex Koller exemptions & holiday homes article and the Swiss land registry & notarisation resource as they are published.

Those who want to understand their own position can also consult the Swiss Bar Association for practitioner referral information and guidance on where to find legal help. This guide is general information on lex koller notary switzerland practice and is not legal advice; because outcomes depend on the precise facts and the current statutory text, buyers, banks and advisors should obtain transaction-specific guidance from a qualified Swiss notary before signing.

Sources

1. Swiss Federal Office of Justice (FOJ)
2. Fedlex, Official collection of Swiss federal law
3. Federal Supreme Court (Bundesgericht), judgments database
4. Swiss Bar Association (SAV-FSA)
5. Canton of Zurich, cantonal portal