Civil Law and UAE: Nullity and Annulment of Acts

1. Introduction

Under UAE civil law, nullity and annulment are two important mechanisms for dealing with defective legal acts, especially contracts.

The current framework is the Federal Decree-Law No. 25 of 2025 issuing the Civil Transactions Law, which entered into force on 1 June 2026 and repealed the former Federal Law No. 5 of 1985. (UAE Legislation)

The distinction is fundamental:

Nullity (بطلان / voidness) concerns an act that is legally defective at its foundation and produces no legal effect.

Annulment (إبطال) concerns a voidable act that initially produces legal effects but may be set aside at the request of the person protected by law.

A void act generally cannot be cured by ratification.

A voidable act may, in appropriate circumstances, be ratified, causing the right to annul to disappear.

The new Civil Transactions Law expressly regulates these concepts in Articles 186–192. (UAE Legal Notes)

2. Meaning of Nullity

Nullity means that a legal act fails to satisfy an essential legal requirement necessary for its validity.

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

an essential element;

the subject matter;

the cause/purpose; or

a legally prescribed form required for conclusion of the contract.

A void contract:

produces no legal effect;

cannot be ratified;

may be invoked by any person having an interest; and

may be declared by the court on its own initiative.

The action for nullity is subject to a 15-year limitation period from conclusion of the contract. (UAE Legal Notes)

Example

A contract purporting to sell property through a transaction expressly prohibited by mandatory law may be void if the statutory requirements make the transaction legally impossible.

The issue is not merely whether one party breached the contract. The question is whether the legal act itself was incapable of producing the intended legal effect.

3. Meaning of Annulment

Annulment applies to a voidable contract.

Article 188 of the current Civil Transactions Law identifies, among other situations, contracts:

concluded by an unauthorized person concerning another's property;

concluded by an owner concerning property over which another person has a legally protected right;

concluded by a person with limited capacity in circumstances covered by the law;

concluded under coercion; or

otherwise made voidable by legislation.

Importantly, a voidable contract produces legal effects until it is annulled.

Once annulled, it is treated as though it had never existed.

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

4. Nullity vs Annulment

This distinction is one of the most important examination points.

5. Essential Elements of a Valid Contract

Article 186 of the current law describes a valid contract as one that is lawful in its origin and attributes, is issued by a competent person, concerns a subject capable of being governed by the contract, and has an existing, valid and lawful purpose. (UAE Legal Notes)

Therefore, a court examining an allegation of nullity may need to consider:

A. Capacity

Was the person legally capable of entering the transaction?

B. Consent

Was consent actually given?

Was it affected by:

mistake;

deception;

coercion; or

another legally recognized defect?

C. Subject matter

Was the subject:

identifiable;

legally permissible;

capable of being dealt with; and

within the scope of the transaction?

D. Cause/purpose

The current Article 185 provides that a contract without a cause, or with a cause contrary to law, public order or public morals, is void. (LEXAI)

E. Mandatory form

Where legislation makes a particular form essential for formation, failure to comply may produce nullity.

6. Absolute Nullity

Absolute nullity is concerned with defects considered sufficiently fundamental that the legal system refuses to recognize the transaction.

Typical grounds include:

1. Illegal subject

The contract concerns something prohibited by mandatory law.

2. Illegal purpose

The transaction is designed to achieve an unlawful purpose.

3. Fundamental defect

An essential element of the contract is absent.

4. Mandatory formal defect

A legally required form has not been complied with.

5. Public-order violation

The transaction directly conflicts with mandatory rules protecting public order or public morals.

The Dubai Court of Cassation has recently emphasized that mere regulatory or licensing irregularity does not automatically make a contract void. There must be a genuine legal basis connecting the defect to public policy, mandatory form, or a statutory rule of nullity. (Al Tamimi & Company)

7. Partial Nullity

Nullity does not necessarily destroy an entire transaction.

If only one separable part of an agreement is invalid, the court must examine whether the remaining provisions can operate independently.

The central practical question is:

Would the parties' transaction still have legal meaning without the defective provision?

This is particularly important in:

construction contracts;

financing agreements;

shareholder agreements;

commercial leases;

distribution contracts; and

complex investment contracts.

A defective clause does not automatically mean that every other contractual obligation disappears.

8. Annulment for Mistake

The new Civil Transactions Law specifically recognizes mistake as a defect of consent.

Under the current framework:

a mistake concerning the nature of the contract;

a mistake concerning a condition of formation; or

a mistake concerning the subject matter

can render the contract voidable.

An essential mistake can justify annulment where the other party shared the mistake, knew about it, or could easily have detected it. The law also contains a special rule for donations. (LEXAI)

Example

A buyer believes that the agreement is for the purchase of one specific property, while the contractual documents objectively concern a different property. If the statutory requirements are satisfied, the mistake may justify annulment.

9. Annulment for Deception

Deception or fraudulent inducement may also justify annulment.

The basic idea is:

Fraudulent conduct → affects consent → victim enters contract → legal remedy

The conduct must be sufficiently material to have influenced the decision to contract.

UAE jurisprudence has historically distinguished ordinary inaccurate statements from deception sufficiently serious to justify cancellation.

In Khaled Salem Musabeh Humad Al Mheiri v John Cameron [2025] DIFC CA 008, the DIFC Court of Appeal reviewed UAE-law principles concerning misrepresentation and referred to Dubai and Ras Al Khaimah Court of Cassation authorities concerning the degree of deception required under the former Civil Code. (DIFC Courts)

This is a DIFC comparative authority, not a binding mainland UAE precedent.

10. Annulment for Coercion

Where consent is obtained through legally recognized coercion, the contract may be voidable.

The important distinction is:

the contract is not necessarily treated as nonexistent immediately;

the protected party receives the legal right to seek annulment;

if the protected party ratifies the transaction, the right to annul may disappear.

This illustrates the central difference between voidness and voidability.

11. Ratification of Voidable Acts

Ratification is one of the strongest differences between nullity and annulment.

Under Article 188, ratification by the person entitled to annul may extinguish the right to annul in relation to the relevant defect.

Ratification may be:

express; or

implied through conduct.

For example, if a person discovers the relevant defect but subsequently deliberately performs the contract with knowledge of the defect, that conduct may support an argument that the person has accepted or ratified the transaction, depending on the circumstances. (UAE Legal Notes)

A void contract, by contrast, cannot be cured merely by ratification.

12. Notice and Time Limits

The new law contains important procedural protections.

Under Article 190, a person having an interest may give the person entitled to annul a notice requiring them to state whether they intend to exercise the right of annulment. The statutory mechanism provides a period of at least 90 days from receipt of notice.

Article 191 generally provides that the right to annul must be exercised within one year, subject to the specific rules governing the type of defect and the statutory exceptions. (LEXAI)

This produces an important distinction:

Nullity claim: generally 15 years from conclusion of the contract.

Annulment right: generally 1 year under Article 191, subject to its specific starting rules.

These periods should not be confused.

13. Effects of Nullity and Annulment

Article 192 provides the principal consequence:

The parties are restored to the position they occupied before entering into the contract.

If restoration is impossible, compensation may be awarded. (UAE Legal Notes)

Therefore, annulment/nullity can produce:

return of money;

return of property;

cancellation of transferred rights;

restoration of possession;

reversal of contractual benefits; and

compensation where restoration is impossible.

This is commonly described as restitutio in integrum.

14. Case Laws

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

This is an especially relevant post-new-Civil-Law authority.

The dispute concerned ownership of a yacht transferred through documents subsequently established to have been forged.

The Abu Dhabi Court of Cassation treated transactions founded on forged documents as absolutely null and without legal effect. It also considered the consequences of the final criminal findings concerning forgery and the obligation to restore the parties to their previous legal position. (East Laws)

Principle

A transaction founded on a fundamental forgery defect cannot ordinarily acquire validity merely through subsequent dealings.

Importance

This case demonstrates the practical operation of absolute nullity, restitution and good-faith acquisition.

Case 2 — Dubai Court of Cassation, Civil Appeal No. 143 of 2014, judgment of 26 March 2015

The Court stated the established principle that a void contract does not create contractual obligations between its parties.

The declaration of nullity operates retrospectively, treating the transaction as having had no legal existence from its inception. (East Laws)

Principle

Void contract = no contractual obligation + retrospective nullity.

Importance

This is a leading illustration of the difference between:

a void transaction; and

a contract that remains effective until rescinded or annulled.

It is a historical authority under the former Civil Transactions Law, so its principle should now be read alongside Article 187 of the 2025 Law.

Case 3 — Dubai Court of Cassation, Petition No. 201/2004

This authority is frequently cited in UAE jurisprudence concerning deception and gross unfairness.

The case is relevant to the former Civil Code framework under which cancellation for fraudulent misrepresentation required the statutory requirements concerning deception and gross unfairness to be established. (BSpace)

Principle

Not every incorrect statement automatically creates a right to annulment.

The deception must be legally significant and connected to the victim's decision to enter the transaction.

Importance

It illustrates the evidentiary threshold for annulment based upon defective consent.

Historical authority: it arose under the former 1985 Civil Code.

Case 4 — Dubai Court of Cassation, Petition No. 156/2004

This case is associated with the UAE jurisprudence concerning fraudulent misrepresentation and the application of the Civil Transactions Law to commercial transactions where appropriate.

The authority is particularly relevant to the distinction between an ordinary contractual dispute and a transaction induced by legally significant fraudulent conduct. (Ethernet National Digital Library)

Principle

Where deception is alleged as a basis for invalidating a transaction, the court must examine the actual circumstances of consent and the statutory requirements for the remedy.

Importance

It remains useful as historical jurisprudence, but current analysis should be based primarily on the 2025 Civil Transactions Law.

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

This case concerned the distinction between a defective/suspended transaction and a genuinely void transaction in the context of property registration.

The case is useful because it demonstrates that courts must carefully determine the legal consequence attached to a registration defect rather than automatically treating every procedural defect in exactly the same way. (Al Tamimi & Company)

Principle

The legal consequences of non-registration depend on the governing statutory framework and the nature of the requirement.

Importance

The case demonstrates why lawyers must distinguish:

voidness;

rescission;

suspension;

unenforceability; and

regulatory non-compliance.

Case 6 — UAE Federal Supreme Court, Commercial Appeal No. 755/2023, judgment of 6 February 2024

The case involved a broad power of attorney and allegedly unauthorized dispositive acts concerning a business/licence structure.

The Federal Supreme Court examined the scope of authority granted under the power of attorney and the consequences of acts allegedly performed beyond that authority. (East Laws)

Principle

The validity of a dispositive transaction depends not simply on the existence of a power of attorney but on whether the authority actually covers the particular legal act.

Importance

This is particularly relevant to voidable acts and unauthorized dispositions.

Case 7 — Dubai Court of Cassation, judgment concerning licensing restrictions, reported February 2026

The Dubai Court of Cassation considered whether contractual activity outside the scope of a commercial licence automatically rendered the contract void.

The Court rejected the proposition that every licensing irregularity automatically produces contractual nullity. The courts distinguished administrative/regulatory violations from a genuine violation of public order or a mandatory legal rule rendering the transaction void. (Al Tamimi & Company)

Principle

Regulatory violation ≠ automatic contractual nullity.

There must be a legally sufficient connection between the violation and the validity of the contract.

Importance

This is especially important for commercial contracts involving:

licensing;

regulated activities;

financial services;

professional services; and

specialised commercial permissions.

Case 8 — Khaled Salem Musabeh Humad Al Mheiri v John Cameron [2025] DIFC CA 008

This DIFC Court of Appeal decision considered UAE-law principles concerning misrepresentation, deception and defective consent.

The court reviewed the requirement that deceptive conduct must be sufficiently connected to the decision to enter into the contract and discussed earlier UAE Court of Cassation authorities. (DIFC Courts)

Principle

A party seeking annulment based upon deception must establish:

the deceptive representation or conduct;

its materiality;

its effect on consent; and

the legal basis for the requested remedy.

Qualification

This is a DIFC authority applying/discussing UAE-law principles, not binding precedent for mainland UAE courts.

15. Special Importance of Public Order

Nullity becomes particularly important where the transaction violates public order or public morals.

However, courts do not necessarily treat every statutory violation as producing nullity.

The recent Dubai Court of Cassation licensing decision is useful here: the Court emphasized that public-policy nullity requires a genuine legal conflict rather than simply an administrative irregularity. (Al Tamimi & Company)

Therefore:

Mandatory rule + statutory nullity/public-order violation → possible nullity

but:

Administrative irregularity alone → not automatically nullity.

16. Nullity and Unauthorized Acts

A person may purport to act for another person without having sufficient authority.

This creates an important question:

Is the transaction automatically void, or does the law protect the principal by giving them a choice to approve or reject the transaction?

The answer depends on the particular legal rule governing the unauthorized act.

The 2025 Civil Transactions Law expressly identifies certain unauthorized transactions as voidable, rather than automatically void. (LEXAI)

This is a good example of why classification is essential.

17. Nullity and Real Estate Transactions

Real estate transactions require special attention because legislation may impose registration and formal requirements.

A failure to comply with a mandatory registration requirement can, depending upon the applicable legislation and transaction type, affect:

validity;

enforceability;

transfer of ownership;

third-party rights; or

contractual remedies.

Dubai jurisprudence concerning off-plan property has previously treated certain mandatory registration requirements as capable of producing nullity. (Motei & Associates)

Therefore, a lawyer should always identify the specific property legislation applicable to the transaction, rather than relying only on the general Civil Transactions Law.

18. Nullity and Arbitration Clauses

Nullity of the underlying contract does not necessarily mean that every associated clause is automatically invalid.

For arbitration agreements, the UAE Arbitration Law contains a principle of separability.

The decision in YYY Ltd v ZZZ Ltd [2017] DIFC ARB 005 records the relevant UAE arbitration-law approach: an arbitration clause can be treated independently from the underlying contract where the arbitration agreement itself is valid. (DIFC Courts)

Therefore:

Contract invalidity ≠ automatically invalid arbitration agreement.

The arbitration agreement itself must be examined.

19. Nullity and Restitution

Suppose:

A pays AED 1 million;

B transfers an asset;

the contract is subsequently declared void.

The normal objective is to restore both parties to their pre-contractual positions.

Thus:

A returns asset → B returns AED 1 million

If physical restoration is impossible, the court may consider compensation under Article 192. (UAE Legal Notes)

The recent Abu Dhabi yacht case demonstrates the practical importance of this principle where a chain of transactions is based upon forged documents. (East Laws)

20. Nullity, Annulment and Rescission — Important Distinction

These concepts should not be mixed.

Nullity

The contract was fundamentally defective.

Effect: no legal effect.

Annulment

The contract is voidable because the law gives a protected person the right to set it aside.

Effect: once annulled, it is treated as never having existed.

Rescission/termination for breach

The contract was validly formed but one party failed to perform or another statutory/contractual ground for dissolution exists.

Effect: the legal consequences are different from absolute nullity.

Example

A valid construction contract is concluded, but the contractor materially breaches it.

That is generally a performance/termination issue, not necessarily a nullity issue.

By contrast, if the contract itself was legally incapable of formation because an essential statutory requirement was absent, the issue may be nullity.

21. Practical Examples

Example 1 — Illegal purpose

A and B conclude an agreement whose essential purpose is prohibited by mandatory law.

Result: possible absolute nullity.

Example 2 — Coercion

A signs a sale agreement after legally sufficient coercion.

Result: potentially voidable.

A may seek annulment.

Example 3 — Unauthorized sale

A person's property is sold by an unauthorized person.

Result: depending on the statutory circumstances, the transaction may be voidable rather than automatically void.

Example 4 — Forged documents

A property or vessel is transferred using forged ownership documents.

Result: transactions founded upon the forgery may be absolutely null, subject to the applicable property and third-party rules.

The 2026 Abu Dhabi Cassation authority provides a recent example. (East Laws)

Example 5 — Licensing defect

A company performs an activity outside its licence.

Result: this does not automatically mean that every contract it entered into is void. The court must examine the statutory and public-order consequences of the particular violation. (Al Tamimi & Company)

Example 6 — Material mistake

A buyer enters into a contract because of an essential mistake concerning the subject matter.

Result: the contract may be voidable under the current Civil Transactions Law if the statutory requirements are satisfied. (LEXAI)

22. Case-Law Revision Table

The older authorities above should be treated as historical jurisprudence under the former 1985 Civil Transactions Law where their statutory basis was the former Code. The current primary statutory framework is Federal Decree-Law No. 25 of 2025, effective 1 June 2026. (UAE Legislation)

23. Important Examination Points

Remember the following:

Nullity

Fundamental defect → no legal effect → cannot be ratified → any interested person may invoke → court may raise it itself.

Annulment

Protected defect → contract initially effective → entitled person seeks annulment → ratification may cure the defect.

Current limitation structure

Nullity: 15 years from conclusion.

Annulment: generally 1 year under Article 191, subject to the statutory starting rules. (LEXAI)

Consequence

Nullity/annulment → restoration to previous position → compensation if restoration is impossible.

24. Short Exam Formula

Use:

V → D → C → R

V = Validity

↓

D = Defect

↓

C = Classification

Void?

Voidable?

Valid but terminable?

↓

R = Remedy

Nullity

Annulment

Restitution

Compensation

25. Conclusion

The UAE civil-law system makes a fundamental distinction between nullity and annulment.

Under the current 2025 Civil Transactions Law, now effective from 1 June 2026, a void contract suffers from a fundamental defect affecting its legal validity and produces no legal effect. It cannot be ratified, may be invoked by an interested person, and may be declared by the court on its own initiative. A voidable contract, by contrast, remains effective until the protected party exercises the right of annulment; it may also be ratified in accordance with the statutory rules. (UAE Legislation)

The practical consequences are particularly important in real estate, commercial transactions, agency, corporate transfers, licensing, forged documents, mistake, coercion and fraudulent misrepresentation.

For examination purposes, the central distinction is:

Nullity attacks the legal existence or validity of the act; annulment protects a party whose consent or legally protected interest has been affected.

The most important current provisions to remember are Articles 186–192 of the 2025 Civil Transactions Law, especially Articles 187 (void contracts), 188 (voidable contracts), 191 (time limit for annulment), and 192 (effects of nullity/annulment). (UAE Legal Notes)