Civil Law and UAE Multiple Sufficient Causes Doctrine

1. Introduction

The Multiple Sufficient Causes Doctrine addresses situations where two or more independent acts or events are each capable of producing the same damage, and each is sufficient, by itself, to cause the claimant's loss.

This creates a difficult causation question:

If several independent causes could each have produced the same harm, can each responsible actor be held liable even though the claimant cannot identify one single cause as the exclusive cause?

This issue is particularly important in UAE civil law in:

• construction defects;
• medical negligence;
• industrial accidents;
• environmental damage;
• product defects;
• cyber incidents;
• banking fraud;
• supply-chain failures;
• transportation accidents;
• professional negligence;
• digital-platform disputes.

A crucial qualification is that “multiple sufficient causes” is not a separately named, comprehensive statutory doctrine in UAE mainland civil law comparable to a formally codified doctrine bearing that title. It is better understood as a causation framework derived from general civil-liability principles, evidence, judicial assessment of causation, and rules concerning multiple contributing causes.

2. Basic Meaning

Suppose two independent actors cause a fire.

• Fire A alone would have destroyed the building.
• Fire B alone would also have destroyed the building.
• Both fires actually occur.

The claimant cannot reasonably say:

“Fire A caused exactly 40% and Fire B caused exactly 60%.”

The legal problem is therefore:

Cause A → sufficient to cause damage

and

Cause B → independently sufficient to cause damage

The doctrine asks whether legal responsibility can nevertheless be attributed to the actors responsible for those causes.

3. Basic Formula

A useful conceptual formula is:

Multiple Sufficient Causes = Cause A independently sufficient + Cause B independently sufficient + Same legally recognized damage

Where:

A → Damage

and independently:

B → Damage

and:

A + B → Actual Damage

This differs from ordinary cumulative causation.

4. Multiple Sufficient Causes vs Multiple Contributing Causes

These concepts should not be confused.

Example

If:

Defect A alone = collapse

and:

Defect B alone = collapse

then there may be multiple sufficient causes.

But if:

Defect A = 30% weakening

and:

Defect B = 30% weakening

and:

Defect C = 40% weakening

and only the combination causes collapse,

that is better described as cumulative/concurrent causation.

5. Multiple Causes in UAE Civil Liability

UAE civil liability generally requires examination of:

1. wrongful conduct or breach;
2. damage;
3. causal connection.

In contractual cases, the court additionally examines:

• contractual obligations;
• breach;
• contractual risk allocation;
• foreseeability and recoverability of loss.

The central issue remains:

Is the defendant's conduct legally connected to the damage claimed?

Where several causes exist, the court must identify the causal significance of each.

6. The Counterfactual Problem

Traditional causation often asks:

But for the defendant's conduct, would the damage have occurred?

The problem becomes difficult with multiple sufficient causes.

Suppose:

• Defendant A's conduct alone could have caused the loss.
• Defendant B's conduct alone could also have caused the loss.

If we remove A:

B still causes the loss.

If we remove B:

A still causes the loss.

Therefore, a strict “but-for” test can produce an unsatisfactory result.

This is why courts and legal systems sometimes use a broader analysis of material contribution, concurrent causation, legal causation and attribution.

7. UAE Approach: Causation as a Judicial Question

In UAE civil litigation, causation is ordinarily determined through the facts and evidence of the individual case.

The court may consider:

• expert reports;
• technical evidence;
• contractual documents;
• witness evidence;
• electronic records;
• chronology;
• scientific evidence;
• financial records;
• conduct of the parties.

Therefore, the multiple-sufficient-causes question should not be treated as an automatic mathematical rule.

8. Cause A and Cause B Model

Consider:

Cause A

A contractor uses defective electrical wiring.

Cause B

Another contractor independently overloads the electrical system.

A fire occurs.

An expert concludes:

Either defect independently could have caused the fire.

This produces:

A → Fire

and:

B → Fire

The court must then determine:

• whether each actor owed a relevant duty;
• whether each breached that duty;
• whether each cause was legally sufficient;
• whether the damage is recoverable;
• whether one event superseded the other;
• whether the claimant contributed to the loss.

9. Necessary Conditions vs Sufficient Conditions

This distinction is useful.

Necessary cause

A condition without which the harm would not have occurred.

Sufficient cause

A condition capable by itself of producing the harm.

Multiple sufficient causes

A alone → harm

B alone → harm

Both occur.

This creates a problem for traditional “necessary cause” reasoning because neither cause may be individually necessary even though each is independently sufficient.

10. Concurrent Causation

A broader category is concurrent causation.

Concurrent causation occurs when several causes operate around the same time or within the same causal sequence.

For example:

Defective machine + employee negligence + inadequate safety system → injury

Here, the causes may be:

• cumulative;
• concurrent;
• independent;
• sequential.

The court must determine which category best describes the evidence.

11. Sequential Causes

Multiple causes can also occur sequentially.

Example:

Manufacturer defect

↓

Distributor mishandling

↓

Retailer failure to warn

↓

Consumer injury

The first cause does not necessarily eliminate responsibility for later causes.

The court may ask whether a later event:

• merely contributed to the original risk; or
• became an independent intervening cause.

12. Intervening Cause

An intervening event may affect attribution.

Suppose:

Defendant creates dangerous condition → Third party deliberately creates new danger → Injury

The defendant may argue that the third party's conduct became an independent intervening cause.

The claimant may respond that the third party's conduct was:

• foreseeable;
• connected with the original risk;
• part of the causal chain.

Thus:

Multiple causation does not mean unlimited causation.

13. Foreseeability

Foreseeability can help distinguish legally attributable consequences from highly remote consequences.

Example:

A cybersecurity company negligently leaves a vulnerability.

A foreseeable consequence may be:

• unauthorized access;
• data theft;
• service interruption.

A claimant may nevertheless allege a highly unusual chain of events leading to unrelated financial losses.

The court may need to separate:

direct/foreseeable damage

from

remote damage.

14. Claimant's Own Conduct

The claimant's conduct can also become a causal factor.

Example:

Banking platform vulnerability + customer's deliberate disclosure of authentication credentials → fraud

The existence of a platform vulnerability does not automatically establish that the platform should bear the entire loss.

The court may investigate:

• what security obligations existed;
• whether the customer violated instructions;
• whether the fraud would have occurred anyway;
• whether the claimant could have mitigated the loss.

15. Evidence in Multiple-Cause Cases

These cases are heavily evidence-dependent.

Important evidence includes:

• expert reports;
• engineering reports;
• medical records;
• forensic reports;
• system logs;
• CCTV;
• emails;
• transaction records;
• metadata;
• audit trails;
• technical specifications;
• contractual documents.

Causal Evidence Formula

Chronology + Technical Evidence + Expert Analysis + Documentary Evidence + Alternative-Cause Analysis

16. Role of Experts

Experts are particularly important where multiple causes involve technical questions.

For example, in a construction collapse, an expert might determine:

• foundation defect;
• design defect;
• material defect;
• contractor workmanship;
• weather conditions.

The expert may conclude:

Defects A and B were each independently capable of causing the collapse.

The court then determines the legal consequences of those findings.

Important distinction

Expert: technical causation.

Court: legal causation and liability.

17. Multiple Sufficient Causes in Construction

Construction provides an excellent example.

Suppose a building collapses because:

1. the structural design was defective; and
2. the contractor used inadequate materials.

An expert determines that either defect independently could have caused the collapse.

The court must determine:

• designer's duty;
• contractor's duty;
• contractual obligations;
• professional standards;
• causation;
• damage;
• contractual allocation;
• contribution between responsible parties.

This is a classic setting for multiple-cause analysis.

18. Multiple Sufficient Causes in Medical Liability

Suppose a patient suffers a serious injury.

Two independent medical errors are identified:

• Doctor A administers an inappropriate treatment.
• Doctor B independently fails to provide necessary treatment.

Medical evidence establishes that either error independently could have produced the injury.

The court must carefully determine:

• the medical standard;
• breach;
• causation;
• patient's underlying condition;
• alternative causes;
• expert evidence.

Medical causation is especially fact-sensitive, so the multiple-sufficient-causes framework should not be applied mechanically.

19. Multiple Sufficient Causes in Digital Economies

Digital systems can produce multiple independent causes.

Example:

Cybersecurity vulnerability A

and

Authentication failure B

Both independently permit fraudulent access.

The resulting loss is AED 5 million.

Possible actors:

• software provider;
• platform operator;
• cybersecurity company;
• payment processor.

The court may need to determine whether:

A alone → loss

and:

B alone → loss

If so, the ordinary single-cause analysis becomes inadequate.

20. Multiple Sufficient Causes and AI

AI systems create another potential application.

Suppose:

• defective training data causes an incorrect decision;
• defective model architecture independently causes the same incorrect decision.

Both may be independently sufficient.

Potential actors include:

• data provider;
• model developer;
• AI deployer;
• system integrator;
• human decision-maker.

The legal analysis should separate:

technical causation

from:

legal responsibility.

AI involvement does not automatically create liability for every participant.

21. Multiple Sufficient Causes and Product Liability

Suppose a machine has:

• manufacturing defect A; and
• safety-control defect B.

An accident occurs.

Expert evidence establishes that either defect independently could have caused the accident.

Possible responsible parties include:

• manufacturer;
• importer;
• distributor;
• installer;
• maintenance provider.

The court should identify the legal duty and causal contribution of each actor.

22. Multiple Sufficient Causes and Environmental Harm

Environmental damage may have:

• industrial emissions;
• chemical leakage;
• construction activity;
• natural conditions.

Several sources may independently be capable of causing the same environmental damage.

This creates difficult problems of:

• scientific causation;
• temporal attribution;
• geographical attribution;
• expert evidence;
• quantification.

The court may need particularly strong scientific evidence before attributing liability.

23. Case Law

Because UAE mainland law does not contain a single, universally named “Multiple Sufficient Causes Doctrine,” the authorities below should be understood as analogical authorities concerning causation, contractual responsibility, evidence, attribution and multiple-party commercial relationships. It would be inaccurate to say that all of them directly establish a multiple-sufficient-causes rule.

1. NMC Healthcare Ltd (in Administration) v Dubai Islamic Bank PJSC [2023] ADGM CFI 042

This case involved complex financial and contractual relationships and UAE-law issues.

Relevance

It demonstrates the importance of analysing:

• the precise legal relationship;
• contractual duties;
• evidence;
• causation;
• the legal consequences of particular conduct.

Application

In a multiple-cause case, the court should similarly avoid treating an entire commercial structure as one undifferentiated cause.

Principle: Identify the individual legal obligations and their relationship to the claimed loss.

Status: ADGM authority; illustrative rather than binding mainland UAE precedent.

24. DNB Bank ASA v Gulf Eyadah Corporation & Gulf Navigation Holding PJSC

This major UAE-connected dispute concerned cross-border judgment recognition and enforcement.

Relevance

Although not a direct multiple-causation case, it demonstrates the importance of separating:

• substantive liability;
• jurisdiction;
• recognition;
• enforcement;
• procedural consequences.

Application

A claimant who establishes multiple causes must still establish the appropriate legal and procedural route against each relevant defendant.

Status: Analogical cross-border authority.

25. Gulf Navigation Holding PJSC v DNB Bank ASA

The associated proceedings concerned arbitration, court jurisdiction and enforcement issues.

Relevance

The case illustrates how complex commercial disputes may involve overlapping:

• contractual obligations;
• arbitration arrangements;
• court proceedings;
• enforcement mechanisms.

This is relevant to multiple-cause litigation because establishing causation is only one component of the ultimate liability analysis.

Status: Analogical authority.

26. Credit Suisse (Switzerland) Ltd v Ashok Kumar Goel & Others [2020] DIFC CFI 066

This case involved sophisticated financing and guarantee arrangements.

Relevance

Where several actors are involved in a loss, the court must determine the precise contractual obligation undertaken by each actor.

This supports an important proposition for multiple sufficient causes:

A causal connection must be combined with a legally recognized obligation before contractual liability can be imposed.

Status: DIFC authority; not automatically binding in mainland UAE.

27. Standard Chartered Bank v Investment Group Private Limited [2014] DIFC CFI 026

This financing dispute concerned contractual obligations in a sophisticated commercial arrangement.

Relevance

It illustrates why courts need to distinguish:

• principal obligations;
• guarantees;
• defaults;
• contractual rights;
• resulting losses.

In a multiple-cause dispute, several entities may contribute factually, but each must be examined according to its own legal obligation.

Status: DIFC authority; analogical for mainland UAE analysis.

28. IDBI Bank Limited v Amira C Foods International DMCC & Karan A. Chanana [2020] DIFC CFI 022

This case involved multiple parties in a financial arrangement.

Relevance

It is useful for analysing how different legal roles can create different obligations.

In multiple-cause cases:

Multiple participants do not necessarily mean identical liability.

Each participant's:

• legal capacity;
• undertaking;
• breach;
• causal contribution

must be separately examined.

Status: DIFC authority; illustrative.

29. ICICI Bank Ltd v Bavaguthu Raghuram Shetty [2022] DIFC CFI 034

This case concerned electronic contracting and related issues of attribution.

Relevance to multiple sufficient causes

Digital transactions may involve several independent systems.

For example:

Electronic authorization failure + payment-system failure

may independently permit the same fraudulent transaction.

The case is useful in understanding why the court must identify:

• whose electronic act occurred;
• whether it was authorized;
• what evidence establishes it;
• what legal consequences follow.

Status: DIFC authority; analogical rather than a direct multiple-causation precedent.

30. Jonathan Lau v Qashio Holding Company Ltd & Armin Moradi Tosarvandani [2026] DIFC CFI 058

This case is particularly relevant to modern evidentiary problems.

The proceedings involved production of corporate, banking, accounting and electronic materials, including native electronic documents and metadata.

Relevance

Multiple sufficient causes frequently cannot be resolved without reconstructing:

Who → did what → when → using which system → producing what consequence.

Electronic records can therefore become crucial to causal attribution.

Status: DIFC authority; evidentiary/analogical relevance.

31. Important Qualification Regarding the Cases

For examination accuracy, it is better to write:

“UAE courts apply general causation, damage, evidence and attribution principles to multi-cause disputes; there is no single reported mainland UAE decision that can safely be described as creating a comprehensive, standalone ‘multiple sufficient causes doctrine’ equivalent to the common-law doctrine.”

This is more accurate than attributing a detailed standalone rule to a UAE case that did not actually decide it.

32. Multiple Sufficient Causes vs Alternative Liability

These doctrines should also be distinguished.

Multiple sufficient causes

A and B each independently cause the harm.

Alternative liability

The claimant knows that one of several defendants caused the harm but cannot identify which one.

Example:

A or B caused the injury, but not both.

That is different from:

A and B each independently caused the injury.

33. Multiple Sufficient Causes vs Material Contribution

Material contribution

A factor contributes to the damage.

Multiple sufficient causes

Each cause is independently capable of producing the damage.

Therefore:

Every sufficient cause may also be causally relevant, but every contributing cause is not necessarily independently sufficient.

34. Multiple Sufficient Causes vs Joint Liability

These concepts are also different.

Causation

Asks:

Did the conduct cause the damage?

Liability

Asks:

Does the law impose responsibility on the actor?

Joint liability

Concerns the legal consequences where more than one party is responsible.

Thus:

Multiple sufficient causes ≠ automatically joint liability.

The applicable UAE legal rules and facts determine the consequences.

35. Burden of Proof

The claimant generally needs to establish the essential elements of the claim.

In a multiple-cause dispute, the evidentiary task may include demonstrating:

1. the defendant's duty;
2. breach or wrongful conduct;
3. actual damage;
4. causal relationship;
5. legal attribution;
6. quantum.

Where technical causation is disputed, expert evidence may become decisive.

36. Causal Uncertainty

A major problem arises where evidence shows:

“Either A or B could have caused the damage.”

This is weaker than:

“A and B were each independently sufficient.”

The distinction matters.

Stronger case

Expert evidence:

A alone was sufficient, and B alone was sufficient.

More uncertain case

Expert evidence:

A or B might have caused the loss, but we cannot determine which.

The second situation raises different questions of proof and alternative causation.

37. Damage Quantification

Even after causation is established, the claimant must establish the amount of recoverable damage.

For example:

Actual loss = AED 10 million

But the claimant may need to establish:

• which losses resulted from the relevant conduct;
• whether some losses would have occurred anyway;
• whether losses were foreseeable;
• whether mitigation occurred;
• whether contractual limitations apply.

Thus:

Causation determines connection; damages analysis determines recoverable amount.

38. Mitigation

The claimant generally should not unnecessarily increase the loss.

Suppose:

Cause A → initial damage AED 2 million

but the claimant's unreasonable failure to mitigate causes:

additional AED 3 million

The court may need to distinguish the original loss from avoidable additional loss.

Therefore:

Initial causal damage ≠ automatically entire final economic loss.

39. Practical Example

Assume a UAE warehouse burns down.

Two independent events occur:

Cause A

Electrical wiring is defective.

Cause B

A separate machine overheats because of an independent defect.

An expert concludes:

Either event independently would have caused the complete warehouse fire.

The court should examine:

Defendant A

• Did A owe a duty?
• Was the wiring defective?
• Was the defect attributable to A?
• Was the fire a legally connected consequence?

Defendant B

• Did B owe a duty?
• Was the machine defective?
• Was the overheating attributable to B?
• Was the fire a legally connected consequence?

Claimant

• Did the claimant contribute?
• Were safety procedures followed?
• Was the damage mitigated?

Contract

• Were risks allocated by contract?
• Were warranties or indemnities applicable?

Only after these questions can legal responsibility be determined.

40. Multi-Factor Causation Framework

A useful UAE civil-law analytical model is:

Stage 1 — Identify all possible causes

A + B + C + D

Stage 2 — Classify each cause

• necessary;
• sufficient;
• contributing;
• concurrent;
• intervening.

Stage 3 — Establish technical causation

Use:

• expert evidence;
• documents;
• chronology;
• digital evidence.

Stage 4 — Establish legal duty

Ask:

Did this actor owe a relevant legal or contractual duty?

Stage 5 — Determine legal causation

Ask:

Is the consequence sufficiently connected and legally attributable?

Stage 6 — Examine claimant contribution

Ask:

Did the claimant contribute to the damage?

Stage 7 — Determine recoverable damage

Ask:

What loss is legally recoverable?

41. Examination Diagram

Cause A

↘

Actual Damage

↗

Cause B

If:

A alone → Damage

and:

B alone → Damage

then:

Multiple Sufficient Causes

But legal liability still requires:

Duty + Breach/Fault + Causation + Attribution + Damage

42. Key Revision Table

43. Short Exam Answer

The multiple sufficient causes doctrine concerns situations where two or more independent causes are each capable, by themselves, of producing the same damage. UAE mainland civil law does not establish a single comprehensive statutory doctrine under this name. Instead, courts can analyse such disputes through general principles of civil liability, causation, damage, evidence, contractual obligations and legal attribution. The court must distinguish sufficient causes from merely contributing causes, identify the duties owed by each defendant, examine expert and documentary evidence, consider intervening events and claimant conduct, and determine which damage is legally attributable to each actor. DIFC and ADGM decisions can provide useful comparative or analogical guidance but are not automatically binding mainland UAE precedents.

44. Key Formula

Multiple Sufficient Causes

Cause A independently sufficient

Cause B independently sufficient

Actual legally recognized damage

Duty/Breach/Fault

Proof

→

Potential Civil Liability

But:

Multiple sufficient causes do not automatically mean that every actor is liable for every loss.

45. Conclusion

The multiple sufficient causes problem is especially important in modern UAE civil law because commercial, technological and industrial harm increasingly results from several independent systems operating simultaneously.

The proper approach is not simply to ask:

“Who caused the damage?”

Instead, the court should ask:

1. What were the possible causes?
2. Was each cause independently sufficient?
3. Who was legally responsible for each cause?
4. What duty was breached?
5. What evidence proves the causal connection?
6. Was there an intervening event?
7. Did the claimant contribute?
8. What damage is legally attributable?
9. What contractual or statutory rules modify liability?
10. What remedy follows?

The central examination principle is therefore:

Multiple sufficient causes create a causation problem, not an automatic liability rule.

The strongest UAE analysis combines causation + legal duty + evidence + attribution + damage, while carefully distinguishing mainland UAE jurisprudence from the separate jurisprudence of the DIFC and ADGM.