Civil Law and UAE: Nullity and Voidability under UAE Civil Code

1. Introduction

Nullity and voidability are two different legal consequences that arise when a contract fails to satisfy the requirements of UAE civil law.

Under the new UAE Civil Transactions Law, Federal Decree-Law No. 25 of 2025, effective from 1 June 2026, the distinction is particularly important:

A void contract (nullity) suffers from a fundamental legal defect and produces no legal effect.

A voidable contract is effective unless and until the person entitled to annul it exercises that right or a court annuls it.

A void contract generally cannot be ratified, whereas a voidable contract can generally be ratified.

Nullity protects fundamental legal requirements, while voidability primarily protects a party whose consent, capacity, or legal position has been affected. (LEXAI)

Because the new Civil Transactions Law came into force on 1 June 2026, older UAE cases based on Federal Law No. 5 of 1985 should be treated as historical jurisprudential guidance, subject to the new legislation and its transitional rules.

2. Meaning of Nullity

Nullity means that a contract is legally defective at a fundamental level.

Under Article 187 of the 2025 Civil Transactions Law, a contract is void where it is unlawful in its essence or attributes because of a defect in its:

essential elements;

subject matter;

cause/purpose; or

legally required form.

A void contract:

produces no legal effect;

cannot be ratified;

may be invoked by an interested person; and

may be declared by the court on its own initiative.

The new law also provides a 15-year period for bringing an action seeking a declaration of nullity. (LEXAI)

Simple example

A contract for the sale of property is concluded in circumstances where a mandatory statutory form required for validity is completely absent.

If the missing form is one imposed by law as a condition of validity, the transaction may be void, rather than merely voidable.

3. Meaning of Voidability

A voidable contract is different.

Article 188 of the new Civil Transactions Law identifies circumstances in which a contract is voidable, including:

an unauthorized person's disposition of another's property;

certain transactions involving limited legal capacity;

coercion;

and other situations where the law expressly provides for voidability.

The important feature is that the contract continues to produce legal effects unless it is annulled.

If annulled, it is treated as though it never existed.

If properly ratified, ratification operates retrospectively from the date of conclusion, subject to the rights of third parties. (UAE Legislation)

4. Nullity vs Voidability

5. Article 189 — Ratification of a Voidable Contract

The new law gives important legal consequences to ratification.

A person entitled to annul a voidable contract may ratify it expressly or impliedly.

Once validly ratified:

the defect is cured for the relevant purpose;

the right to annul based on that defect disappears;

ratification operates retrospectively from the date of the contract, subject to third-party rights.

This is one of the clearest distinctions between nullity and voidability. (UAE Legislation)

Example

A person signs a contract under legally recognized coercion. After the coercion ends, that person knowingly continues to perform the contract and confirms it.

That conduct may amount to ratification, preventing later annulment on the same ground.

6. Article 190 — Notice to Exercise the Right of Annulment

The 2025 Civil Transactions Law also provides a mechanism allowing a person with an interest to require the person entitled to annul a voidable contract to declare whether they intend to exercise the right.

The notice period must be at least 90 days from the day following receipt of the notice.

Failure to exercise the right within the applicable period, without an acceptable excuse, can cause the right to annulment to lapse. (LEXAI)

This mechanism prevents a person from keeping the contractual relationship indefinitely uncertain.

7. Article 191 — Limitation of the Right of Annulment

Article 191 provides that the right to annul generally lapses if not exercised within one year, unless the law provides otherwise.

The starting point differs according to the defect.

For example:

limited capacity → when the incapacity ends;

mistake or deception with gross unfairness → when discovered;

coercion → when coercion ends;

exploitation → from the date of the contract.

The law also provides an outside limit of 15 years for annulment based on mistake, deception or coercion. (UAE Legislation)

8. Effects of Nullity and Annulment

Article 192

When a contract is void or annulled, the general rule is restitution.

The parties should be restored to the position they occupied before the contract.

If restoration is impossible, compensation may be awarded.

Thus:

Contract → Nullity/Annulment → Restitution → Compensation where restoration is impossible

Article 192 also contains a special protection for a discerning minor in appropriate limited-capacity cases: the minor's obligation to return is restricted to the benefit actually received. (UAE Legislation)

9. Partial Nullity

Not every defect necessarily destroys the entire contract.

Under Article 193:

if only part of the contract is void or voidable, that part may be separated;

the remainder can survive where the contract is capable of operating independently;

if it is established that the parties would not have concluded the contract without the defective part, the entire contract may be affected.

The same provision also recognizes conversion: where a void or voidable contract contains the elements of another contract, it may operate as that other contract if the statutory requirements are satisfied. (UAE Legislation)

Example

A contract contains five independent obligations, but one particular clause violates a mandatory legal rule.

If the clause can be separated without destroying the commercial purpose of the agreement, the court may preserve the remainder.

10. Grounds of Nullity

Important grounds include:

A. Absence of an essential element

If the fundamental elements necessary for a contract are absent, the transaction may be void.

B. Unlawful subject matter

A contract cannot obtain civil-law validity merely because parties have agreed to it if its subject matter is prohibited by mandatory law.

C. Unlawful purpose

The purpose or cause must satisfy the requirements of law and public order.

D. Mandatory form not satisfied

Where legislation makes a particular form essential to validity, failure to comply can result in nullity.

E. Forgery

Transactions based upon forged documents can give rise to absolute nullity.

F. Public-order violation

Party autonomy does not permit contracting parties to override mandatory rules protecting public order.

11. Grounds of Voidability

Common grounds include:

1. Coercion

A person whose consent was obtained through legally recognized coercion may have a right to annul.

2. Limited legal capacity

Certain transactions involving persons with limited capacity may be voidable rather than absolutely void.

3. Unauthorized disposition

A transaction by an unauthorized person concerning another's property can fall within Article 188.

4. Mistake

A legally significant mistake can affect contractual validity depending upon its nature and statutory requirements.

5. Deception

Fraudulent conduct that induces consent may give the affected party a right of annulment.

6. Exploitation

Where statutory requirements concerning exploitation/gross unfairness are satisfied, annulment may be available.

12. Nullity Is Different from Termination

This distinction is important in examinations.

Nullity

The contract suffers from a fundamental legal defect.

Effect: the law treats the contract as having no valid contractual effect.

Termination

A valid contract existed but subsequently comes to an end because of contractual or statutory grounds.

Rescission/annulment

A voidable contract is brought to an end because a legally protected party exercises the right of annulment.

Therefore:

Nullity ≠ Voidability ≠ Termination

13. Nullity and Public Order

UAE civil law recognizes that contractual freedom is subject to mandatory law and public order.

Therefore, parties cannot always say:

“We agreed to it, so the court must enforce it.”

If the agreement violates a mandatory statutory requirement, the court must examine the legal consequences.

This principle is particularly important in:

real estate;

corporate transactions;

regulated financial activities;

consumer contracts;

arbitration;

property registration;

licensing;

family-related transactions; and

transactions involving forged documentation.

14. Important UAE Case Laws

Case 1 — Abu Dhabi Court of Cassation, Commercial Appeal No. 206/2026, 14 May 2026

This is particularly important because it is a post-1 June 2026 jurisprudential development concerning nullity.

The dispute concerned a yacht whose ownership had been transferred through forged documentation.

The Abu Dhabi Court of Cassation treated transactions founded on forged documents as absolutely null, emphasizing that such transactions produce no legal effect and that nullity may be raised by an interested person and by the court itself.

The Court also dealt with the consequences of a final criminal judgment concerning forgery and restoration of the property to the original position. The decision is reported in secondary legal commentary, so its detailed factual characterization should be checked against the official judgment when available. (East Laws)

Principle: Forgery affecting the legal foundation of a transaction can produce absolute nullity rather than a merely voidable contract.

Case 2 — Federal Supreme Court, Appeal No. 284 of Judicial Year 25, 27 January 2004

The Federal Supreme Court explained the nature of a void contract under the then Article 210 of the Civil Transactions Law.

The Court treated a void contract as having no legal existence capable of producing the ordinary contractual effects and recognized that an interested person could invoke the nullity.

Although this case predates the 2025 Civil Transactions Law, its reasoning remains useful as historical UAE jurisprudence on the distinction between absolute nullity and ordinary contractual defects. (Mondaq)

Principle: Fundamental defects in the legal elements of a contract may result in absolute nullity.

Case 3 — Abu Dhabi Court of Cassation, Civil and Commercial Appeal No. 286/2014, 3 June 2014

The Court considered a transaction involving a future subject matter and the requirements concerning uncertainty and ability to perform.

The case is frequently cited in UAE legal commentary concerning Article 202 and the requirements for a lawful and sufficiently certain contractual subject matter.

The decision illustrates that the absence of legally required characteristics of the contractual subject can affect the validity of the transaction. (Wasel & Wasel)

Principle: A contractual subject must satisfy mandatory requirements concerning legality, certainty and performance.

Case 4 — Dubai Court of Cassation, Appeal No. 14/2012

The Dubai Court of Cassation considered statutory registration requirements in the context of an off-plan property transaction.

The decision is discussed in UAE legal commentary as illustrating the relationship between mandatory real-estate registration rules and contractual validity.

It is important because it demonstrates that statutory requirements governing the transfer or registration of property rights can have consequences beyond an ordinary breach of contract. (Law Gratis)

Principle: Where legislation makes compliance with a particular statutory requirement essential to the legal transaction, non-compliance may affect civil validity.

Case 5 — Dubai Court of Cassation, Property Appeal No. 85/2010

This case concerned the consequences of non-registration in Dubai real-estate transactions.

The Dubai Court of Cassation upheld the lower-court treatment of the relevant contractual consequences under the applicable Dubai property-registration regime. The case is significant for distinguishing regulatory/registration requirements from ordinary contractual breach. (Al Tamimi & Company)

Principle: The court must determine whether a statutory registration requirement is merely regulatory or is a condition affecting contractual validity.

Case 6 — Dubai Court of Cassation, Appeal No. 405/428 of 2001

This decision concerned contractual conditions contrary to mandatory legal rules and public policy.

The reported jurisprudence explains that a condition cannot be sustained where it permits something prohibited, prohibits something lawful, or conflicts with public order or morals.

The decision is useful for understanding the public-order dimension of contractual nullity. (ueaeprints.uea.ac.uk)

Principle: Contractual autonomy cannot validate conditions that conflict with mandatory legal rules or public order.

Case 7 — Dubai Court of Cassation, Case No. 27/2009

The Court considered contractual exclusion clauses in the insurance context.

The decision emphasized the importance of statutory requirements governing the presentation and clarity of exclusion clauses and treated the applicable mandatory requirements as legally significant.

It demonstrates that a contractual clause cannot simply defeat mandatory statutory protections through vague or inadequately presented wording. (Mondaq)

Principle: Mandatory statutory requirements can restrict contractual freedom and affect the legal effectiveness of contractual clauses.

15. Voidability and Misrepresentation — UAE Law

The UAE law of consent is especially important when discussing voidability.

Under the former Civil Code provisions, which remain useful as historical jurisprudential background, misrepresentation involved deception by words or conduct that induced the other party to consent to something they otherwise would not have accepted.

The DIFC Courts' decision in Khaled Salem Musabeh Humaid Al Mheiri v John Cameron [2021] DIFC CFI 057 carefully reproduced and analysed the UAE Civil Code provisions concerning misrepresentation and mistake. (DIFC Courts)

The later Al Mheiri v Cameron [2025] DIFC CA 008 also considered the UAE-law principles of misrepresentation, including deceptive statements and deliberate silence. (DIFC Courts)

These are DIFC decisions applying/considering UAE law, not binding precedents for the UAE mainland courts.

16. Mistake and Voidability

A mistake must be distinguished from an ordinary misunderstanding.

Under the former UAE Civil Code framework, an error concerning the identity or essential characteristics of the contract or subject matter could result in a fundamentally defective contract, whereas mistakes concerning non-essential characteristics could give rise to a right of cancellation.

This distinction remains conceptually important under the new framework, but the 2025 Civil Transactions Law should be consulted for the current statutory treatment rather than automatically importing the old article numbering.

17. DIFC Case: Khaled Salem Musabeh Humaid Al Mheiri v John Cameron

Khaled Salem Musabeh Humaid Al Mheiri v John Cameron [2025] DIFC CA 008 is particularly useful for understanding UAE-law consent defects.

The dispute involved alleged representations made before an indemnity agreement was entered into.

The Court considered the UAE Civil Code provisions dealing with:

misrepresentation;

deliberate silence;

gross cheating;

third-party misrepresentation; and

mistake.

The Court recognized that UAE law permits cancellation in circumstances where legally sufficient misrepresentation has induced contractual consent. (DIFC Courts)

Importance: Consent must be genuine; however, not every inaccurate statement automatically makes a contract void.

18. DIFC Case: Amjad Hafeez v Damac Park Towers

In Amjad Hafeez v Damac Park Towers Company Limited [2014] DIFC CFI 002, the claimant alleged misrepresentation and deceit concerning an apartment.

The Court examined whether the pleadings adequately established the alleged misrepresentation and refused to treat allegations of misrepresentation as sufficient without proper particulars.

(DIFC Courts)

Principle: A party seeking relief based upon misrepresentation must establish the legally relevant misrepresentation rather than merely asserting dissatisfaction with the transaction.

19. DIFC Case: Gjurd v Gizella (DIFC) Ltd

In Gjurd v Gizella (DIFC) Limited [2016] DIFC SCT 081, the Court examined whether an investment transaction was affected by mistake.

The Court considered the importance of the mistake and whether the parties knew or ought to have known about it. It concluded that the relevant mistake concerning the agreed investment product was sufficiently important to justify avoidance under the applicable DIFC law. (DIFC Courts)

Principle: A legally significant mistake must be material enough to affect the decision to contract and must satisfy the statutory requirements for avoidance.

20. DIFC Case: Ahmed Seddiq Mohamed Samea Almutawa v Mohamed Seddiq Mohamed Samea Al Mutawa

In Ahmed Seddiq Mohamed Samea Almutawa v Mohamed Seddiq Mohamed Samea Al Mutawa [2023] DIFC CFI 095, the Court considered an alleged misunderstanding concerning contractual consideration.

The Court found that the written agreement and surrounding conduct did not establish the required legal elements of mistake. It also considered the parties' subsequent conduct and affirmation of the agreement. (DIFC Courts)

Principle: A mere assertion that a party misunderstood an agreement does not automatically establish a legally actionable mistake.

21. DIFC Case: Dimension B+ Ltd v Almaazmi

In Dimension B+ Ltd v Saleh Abdelkarim Hussain Abdelrahman Almaazmi [2024] DIFC CFI 094, the Court emphasized that a person who signs an integrated written agreement is generally bound by it.

The Court recognized exceptions where a genuine vitiating factor exists, such as:

fraud;

misrepresentation;

duress; or

fundamental mistake.

(DIFC Courts)

Principle: A party cannot ordinarily escape contractual obligations merely by claiming that they did not read or understand the document.

22. Nullity and Voidability in Property Transactions

Property transactions require special attention because UAE legislation frequently imposes:

registration requirements;

title requirements;

approval requirements;

authority requirements; and

mandatory procedural formalities.

The legal consequence of non-compliance depends upon the specific statute.

It is therefore incorrect to use the formula:

“Regulatory violation = automatic nullity.”

Modern UAE jurisprudence distinguishes between:

Administrative/regulatory violation → statutory consequence → public-order analysis → contractual consequence.

A court must determine whether the relevant legislation actually makes the requirement a condition of validity. Recent UAE legal commentary concerning 2026 Dubai Court of Cassation decisions emphasizes this distinction. (Law Gratis)

23. Nullity and Arbitration Clauses

An important principle is that the invalidity of the main contract does not necessarily destroy an arbitration agreement contained within it.

Under the UAE Arbitration Law, the arbitration agreement is treated as separate from the underlying contract.

Therefore:

Main contract void → arbitration clause does not automatically become void.

The arbitration agreement must independently satisfy the requirements for validity.

This is known as the principle of separability.

UAE jurisprudence has also dealt extensively with capacity and authority to enter into arbitration agreements. (DIFC Courts)

24. Nullity vs Breach of Contract

This is another important examination distinction.

Breach

A valid contract exists, but one party fails to perform.

Remedies may include:

performance;

damages;

termination/rescission;

other contractual remedies.

Nullity

The contract itself is fundamentally defective.

Main consequence:

the contractual relationship is treated as legally ineffective;

restitution generally follows.

Thus:

Breach attacks performance.

Nullity attacks validity.

25. Practical Example

Suppose A sells a property to B.

Situation 1 — Valid contract + later non-performance

The contract is valid, but A refuses to transfer the property.

This is principally a breach/performance dispute.

Situation 2 — Contract concluded under coercion

B was forced into signing.

This may constitute voidability, assuming the statutory requirements are satisfied.

Situation 3 — Forged ownership document

A transaction is created through forged ownership documents.

This can constitute absolute nullity.

Situation 4 — Missing mandatory registration

The parties sign a transaction but fail to satisfy a statutory registration requirement.

The court must determine whether the relevant legislation makes registration a condition of validity or imposes another consequence.

Situation 5 — Party later confirms a voidable transaction

If the person entitled to annul knowingly ratifies the contract, the right of annulment may disappear.

26. Key Legal Tests

Test for Nullity

Ask:

Is there a valid contract element?

Is the subject matter lawful?

Is the purpose lawful?

Has a mandatory form been satisfied?

Does the transaction violate mandatory law or public order?

Does legislation expressly prescribe nullity?

If a fundamental requirement is absent, nullity may arise.

Test for Voidability

Ask:

Was there a contract?

Who is legally protected?

Was there coercion, limited capacity, unauthorized dealing, mistake, deception or another statutory ground?

Who has the right to annul?

Has the right been exercised within the statutory period?

Has the contract already been ratified?

27. Examination Comparison

28. Important Revision Points

Nullity means fundamental invalidity.

Voidability means the contract remains effective until annulled.

A void contract cannot ordinarily be ratified.

A voidable contract can generally be ratified.

Article 187 deals with the void contract under the 2025 Civil Transactions Law.

Article 188 deals with voidable contracts.

Article 189 concerns ratification.

Article 190 provides a notice mechanism concerning exercise of the right of annulment.

Article 191 addresses limitation of annulment.

Article 192 provides for restoration after nullity or annulment.

Article 193 deals with partial nullity and conversion.

Forgery can result in absolute nullity.

Not every regulatory violation automatically creates nullity.

Mistake, coercion and deception must satisfy their statutory requirements.

The invalidity of a main contract does not necessarily invalidate an arbitration clause.

DIFC decisions are useful comparative/persuasive material but are not binding precedent for mainland UAE courts.

Conclusion

Under the current UAE Civil Transactions Law effective from 1 June 2026, the distinction between nullity and voidability is fundamental.

Nullity concerns a fundamental defect in the contract itself. The void contract produces no legal effect and cannot ordinarily be cured through ratification.

Voidability, by contrast, protects a particular party affected by circumstances such as coercion, limited capacity or unauthorized dealing. The contract remains effective until the entitled person obtains or exercises annulment, and it may be ratified.

The practical formula is:

Fundamental defect → Nullity → No contractual effect → Restitution

whereas:

Protected party + statutory defect → Voidability → Contract remains effective → Annulment or ratification → Restitution where annulled.

For current UAE-law study, the 2025 Civil Transactions Law should be treated as the primary statutory framework, while pre-1 June 2026 UAE Cassation decisions should be used carefully as historical authorities whose reasoning must be reconciled with the new Code. (afridi-angell.com)