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Property purchase under duress: unjustified fear under section 870 ABGB

Property purchase under duress: section 870 ABGB, unjustified and well-founded fear, evidence, boundaries and careful unwinding.

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1 October 2026 · Mag. Bernhard Brandauer, Rechtsanwalt

Anyone who signs a property purchase contract because of a concrete threat needs to classify the situation quickly and precisely. Section 870 ABGB refers to unjustified and well-founded fear as a reason why the affected person should not be bound to the contract.

This post focuses exclusively on a threat made by the other contracting party. Error, fraudulent deception, usury based on a predicament and questions of authority to sign require a separate review.

The decisive points are the exact wording, the circumstances before the signature and the available evidence. A general statement such as “I was put under pressure” does not replace that assessment.

Classify your case

Property purchase under duress: what should you secure now?

Two questions help organise the contracting party, the sequence of events and the evidence for an initial legal assessment.

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01 Question 1

Did the other contracting party induce you to sign the property purchase contract through a concrete threat?

For section 870 ABGB, the focus is on unjustified and well-founded fear caused by the other contracting party.

All paths at a glance

Overview of all answers.

01

An assessment under section 870 ABGB can be prepared in a focused way.

Organise the exact wording of the threat, the timing, the people involved and the subsequent signature. Have it assessed whether the fear was unjustified and well-founded within the meaning of section 870 ABGB and which declaration is needed to unwind the contract.

Until the review, do not give an acknowledgement, amendment or waiver.

02

The evidence should be organised before making a statement.

Write down the sequence from your perspective at the time and preserve all remaining messages, call data, documents and witness information. Only then can it be assessed responsibly whether there was duress under section 870 ABGB.

An unprepared statement can make later enforcement more difficult.

03

The facts do not automatically fit section 870 ABGB.

Section 870 ABGB concerns being induced to enter into the contract by the other contracting party through unjustified and well-founded fear. Mere dissatisfaction, your own mistake or financial pressure does not answer that question. A threat by a third person also requires a separate legal assessment.

Preserve the sequence nevertheless and have the legal approach that fits the facts reviewed.

Section 870 ABGB: duress as a defect of will

Under section 870 ABGB, a person is not bound to the contract if the other contracting party induced the contract through fraud or through unjustified and well-founded fear. This post addresses only the second ground.

Whether a particular situation falls within it depends on the content of the threat and its connection with the signature. A legal review must therefore clarify what was announced or threatened, who made the statement and whether that fear caused the property purchase contract to be concluded.

The statutory wording does not decide the individual case through a single keyword. The contract, the communication and the immediate reaction to the threat must be considered together.

Distinguishing error, fraud and financial pressure

A false assumption about the property is initially an error issue. Deliberate deception or fraudulent concealment belongs to the ground of fraud. Both subjects are covered in the post on avoidance for error or fraudulent deception.

Financial hardship or a tough negotiating position alone does not establish unjustified and well-founded fear under section 870 ABGB. Mixing these facts risks relying on the wrong legal basis.

If a third person applied the pressure, section 870 ABGB cannot be applied without further assessment. The statutory link to the other contracting party and the question of attribution must be examined separately.

Securing evidence of the threat and the signature

Preserve the complete message history, emails, conversation notes, call data and contract drafts. The connection matters: what was said, when was it said, who could perceive it and when was the contract signed?

Also record which action you took as a consequence of the threat. This may include signing, making a payment, handing over documents or giving a statement in the escrow process. These details form a contemporaneous chronology and do not replace later assessment of evidence.

The post on reviewing the property purchase contract before signing is particularly relevant during ongoing negotiations. After signature, preserve the payment status and the land-register status as well.

Preparing avoidance and unwinding with care

If the requirements of section 870 ABGB are met, the statutory consequence is that the affected person does not have to hold to the contract. That does not create one fixed process for every property purchase. Services already performed, escrow, handover and any land-register process must be organised according to the contract and the actual stage reached.

Do not stop payment, waive rights or change the transaction unilaterally without review. First preserve the contract, the evidence of the threat and the current status. The appropriate statement and next steps can then be determined.

The focus page on purchase contract review provides a broader structure for contract checks. It does not replace an assessment of whether section 870 ABGB is met.

Keep the facts separate

Which question is central?

The terms are close, but they lead to different assessments.

Distinguishing the main starting points in a property purchase
Property-purchase situation Central question First documents
Threat by contracting party Did the other contracting party induce the contract through unjustified and well-founded fear? Wording, recipient, timing, witnesses
Error or false statement Which assumption was wrong at signing and how did it arise? Listing, documents, assurances, draft contract
Financial pressure Is there a threat within the meaning of section 870 ABGB at all? Financial position, negotiation, concrete statement

This table is an initial orientation. The legal assessment must keep the individual facts separate.

Secure the evidence first: Do not delete messages and do not make an uncoordinated statement about avoidance, waiver or further payment after an alleged threat.

FAQ

Property purchase under duress.

What does “unjustified and well-founded fear” mean under section 870 ABGB? +

Section 870 ABGB uses this statutory wording for a threat through which the other contracting party induced the conclusion of the contract. Whether it is met depends on the concrete content, context and evidence.

Can I simply cancel the property purchase? +

There is no general right of cancellation on that basis. If section 870 ABGB may apply, the legal statement and the effects on payment, handover and the land-register process must be assessed specifically.

Is a threat by a third person enough? +

That cannot be answered in general. Section 870 ABGB refers to inducement by the other contracting party. With a third person, attribution and any other possible legal grounds require separate assessment.

Topics
DuressSection 870 ABGBAvoidanceProperty purchase

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