Civil Law And Financial Advisor Fiduciary Duty Breach Claims In Europe

1. Introduction

Financial advisers occupy a position of particular trust because clients may rely upon them to recommend investments, manage portfolios, assess risk, or structure financial transactions.

A fiduciary-duty breach claim may arise where an adviser:

recommends an investment that is unsuitable for the client;

conceals a commission or other financial benefit;

places personal interests above the client's interests;

recommends products because they generate higher remuneration;

fails to disclose a conflict of interest;

provides misleading or incomplete advice;

misrepresents investment risks;

improperly uses client assets or information;

acts outside the authority given by the client;

fails to provide adequate portfolio-management supervision;

gives advice without properly assessing the client's financial circumstances;

continues recommending a product after its unsuitability becomes apparent.

European law requires a distinction between fiduciary duties in the strict private-law sense and the broader conduct-of-business obligations imposed by MiFID II. Not every breach of a regulatory obligation automatically creates a fiduciary relationship or a private damages claim. The applicable national contract, tort, agency and equity/civil-law rules remain crucial.

Under MiFID II, investment firms providing investment advice or portfolio management must obtain information about the client's knowledge and experience, financial situation, ability to bear losses, investment objectives and risk tolerance, so that recommendations are suitable. (esma.europa.eu)

2. Meaning of Fiduciary Duty

A fiduciary is generally a person who has undertaken to act for or on behalf of another in circumstances creating an obligation of loyalty.

The classic formulation is found in Bristol and West Building Society v Mothew [1998] Ch 1.

The fiduciary's central obligations include:

loyalty;

good faith;

avoidance of conflicts;

no unauthorised profit;

acting within the scope of the fiduciary undertaking;

obtaining informed consent where self-interest is permitted.

The recent UK Supreme Court decision in Hopcraft v Close Brothers Ltd [2025] UKSC 33 reaffirmed that fiduciary obligations depend upon the nature of the relationship and the undertaking assumed; merely providing a service or influencing another person's decision does not automatically create a fiduciary relationship. (Supreme Court UK)

This distinction is extremely important for financial advisers.

3. Financial Adviser ≠ Automatically Fiduciary

The mere title:

"financial adviser"

does not automatically establish fiduciary status.

The court normally examines:

the engagement agreement;

whether the adviser acts for the client;

whether the adviser has discretionary authority;

whether the adviser manages client property;

whether the adviser is independent;

whether the adviser receives third-party remuneration;

whether the adviser has assumed responsibility for protecting the client's interests;

whether the relationship involves conflicts of interest;

the relevant statutory/regulatory regime.

A purely execution-only broker may have substantially different obligations from a discretionary portfolio manager.

4. MiFID II and the Adviser's Duties

MiFID II is central to modern European investment-advice disputes.

Under Article 25, investment firms providing investment advice or portfolio management must collect information concerning:

knowledge;

experience;

financial situation;

ability to bear losses;

investment objectives;

risk tolerance.

The recommendation must then be suitable for the client. (esma.europa.eu)

The firm must also provide a suitability statement explaining how the recommendation meets the client's characteristics. (esma.europa.eu)

Importantly, ESMA states that the suitability assessment applies not merely to recommendations to buy but also to decisions whether to buy, hold or sell. (esma.europa.eu)

5. Fiduciary Duty vs Suitability Duty

These should be separated.

Fiduciary duty

Focus:

loyalty and conflicts of interest

Examples:

undisclosed commission;

self-dealing;

secret profit;

conflicted recommendation.

Suitability duty

Focus:

whether the recommendation is appropriate for the particular client.

Examples:

recommending a high-risk derivative to a risk-averse investor;

recommending a complex product without sufficient assessment;

ignoring the client's inability to bear losses.

Information duty

Focus:

whether the client received adequate information.

Examples:

hiding material risks;

failing to explain costs;

misleading description of the product.

One factual situation can breach all three.

6. Case Law 1 — Genil 48 SL and Comercial Hostelera de Grandes Vinos SL v Bankinter SA, C-604/11

This is one of the leading CJEU authorities.

The dispute concerned interest-rate swaps offered to clients in connection with financial products.

The CJEU interpreted the MiFID conduct-of-business rules and explained when a recommendation constitutes investment advice.

The Court held that the characterization of advice depends upon how the financial instrument is offered, including whether the recommendation is presented as suitable for the particular person or based upon that person's circumstances. (Eur-Lex)

Principle

A recommendation does not escape the investment-advice regime merely because the underlying financial product is embedded in another financial transaction.

Fiduciary significance

A financial adviser cannot avoid advisory obligations simply by describing the transaction as:

"hedging"

or

"part of the financing package."

If the firm gives a personalised recommendation to the client, MiFID suitability obligations may apply.

7. Case Law 2 — Mastromartino, C-53/18

This case concerned an Italian financial adviser authorised to provide services away from the firm's premises.

The CJEU considered the status of such a person under MiFID and concluded that an adviser acting exclusively for one investment firm could fall within the concept of a tied agent, rather than being an independent investment firm. (Eur-Lex)

Principle

The legal classification of the adviser depends upon the structure of the relationship with the investment firm.

Importance for fiduciary claims

Suppose an adviser tells a client:

"I am acting solely in your interests."

But legally the adviser is a tied agent acting for a particular investment firm.

That relationship may create important questions concerning:

conflicts;

commissions;

independence;

disclosure;

responsibility of the investment firm.

The financial institution may also have regulatory responsibility for persons acting on its behalf.

8. Case Law 3 — Bristol and West Building Society v Mothew [1998] Ch 1

This is a foundational English fiduciary-duty authority.

The court distinguished a fiduciary obligation from ordinary duties of care.

The central fiduciary obligation is loyalty.

A fiduciary must generally:

act in good faith;

avoid unauthorised profits;

avoid conflicts;

not use the fiduciary position for personal advantage without informed consent.

Financial-adviser significance

A financial adviser who receives an undisclosed benefit from recommending a particular investment may potentially breach the no-profit/no-conflict rules, even if the investment itself performs reasonably well.

Thus:

Good investment outcome does not necessarily cure a conflict-of-interest breach.

9. Case Law 4 — FHR European Ventures LLP v Cedar Capital Partners LLC [2014] UKSC 45

This is a major authority on secret commissions and fiduciary loyalty.

An agent received a commission from the counterparty to a transaction without obtaining the principal's fully informed consent.

The UK Supreme Court held that an unauthorised profit or secret commission received by a fiduciary can be held for the principal.

Principle

A fiduciary cannot secretly profit from the fiduciary position.

Financial adviser application

Suppose:

Investment adviser → recommends Fund X

Fund X secretly pays:

€50,000 commission → adviser

without adequate client disclosure.

The client may potentially have claims concerning:

secret commission;

breach of fiduciary duty;

disgorgement;

rescission where available;

damages or equitable compensation depending on the applicable law.

The important point is that the fiduciary breach concerns the conflict and secret benefit, not merely whether Fund X subsequently made money.

10. Case Law 5 — Kelly v Cooper [1993] AC 205

This Privy Council authority is important when analysing multiple clients and conflicts.

An estate agent represented several clients in circumstances where their interests could conflict.

The court recognised that a fiduciary's duties depend significantly upon the scope of the undertaking and the contractual arrangement.

Principle

Fiduciary obligations are not necessarily unlimited.

The court must identify:

What exactly did the fiduciary undertake to do for the client?

Financial adviser significance

An investment adviser serving many clients may legitimately have multiple relationships.

But the adviser must still comply with:

agreed duties;

conflict rules;

confidentiality;

regulatory requirements.

A financial adviser cannot automatically claim:

"I advise many clients, therefore I owe no fiduciary obligations."

Nor can the client automatically assume that every aspect of the adviser-client relationship is fiduciary.

11. Case Law 6 — Hilton v Barker Booth and Eastwood [2005] UKHL 8

This House of Lords decision concerned solicitors acting in circumstances involving conflicting interests.

The case illustrates the strictness of fiduciary obligations when a professional undertakes to act for a client while simultaneously possessing a conflicting personal interest.

Principle

A fiduciary cannot place himself in a position where his personal interests conflict with the duty owed to the principal without appropriate informed consent.

Financial-adviser application

A financial adviser might simultaneously:

advise a client;

have a financial interest in the product;

receive a commission;

hold an interest in the issuer.

If those interests are not properly addressed, the adviser may face serious conflict-of-interest consequences.

12. Case Law 7 — Hopcraft v Close Brothers Ltd [2025] UKSC 33

This is an especially important modern authority.

The UK Supreme Court examined whether fiduciary duties and the law of civil bribery could arise in commercial relationships involving brokers and financing arrangements.

The Court explained that a fiduciary relationship depends upon an undertaking to act with loyalty and that mere influence over another person's decision is not sufficient. (Supreme Court UK)

The Court also stressed that a purely contractual duty to give disinterested advice is legally distinct from a fiduciary duty of loyalty. (Supreme Court UK)

Importance for financial advisers

This prevents an overly broad proposition:

"Every professional financial adviser is automatically a fiduciary."

Instead, the court should examine:

the engagement;

the actual undertaking;

discretion;

conflicts;

agency;

control of assets;

commercial context.

13. Case Law 8 — Hopcraft's Application of Mothew and FHR

The Supreme Court in Hopcraft expressly reaffirmed the traditional principles from Mothew and FHR.

It stated that fiduciary obligations can arise outside the traditional categories, but there must be circumstances indicating that the person has undertaken to act with loyalty for another. (Supreme Court UK)

This is important for modern financial advisers because advisory structures are increasingly complex:

robo-advisers;

discretionary portfolio managers;

wealth managers;

family-office advisers;

tied agents;

independent advisers;

online investment platforms.

The legal classification cannot be determined simply from the job title.

14. Case Law 9 — Commission v Germany, C-189/11

The CJEU's MiFID jurisprudence also establishes the importance of the regulatory structure governing investment services.

While not a private damages judgment concerning an adviser, the case is useful in understanding Member States' obligations concerning financial-market regulation and investor protection.

It reinforces the broader proposition that investment-service rules form part of an EU framework designed to protect market participants.

For a private claim, however, the claimant must still identify the national-law consequence of the regulatory breach.

15. Case Law 10 — FIBO Markets LTD v J.P., C-346/25

This recent CJEU judgment concerns CFDs and the interaction between financial contracts, consumer contracts and Rome I.

The Court held in June 2026 that certain rights and obligations relating to the financial terms governing execution of a CFD order fall within the financial-instrument exception in Article 6(4)(d) of Rome I, while certain framework-contract provisions do not. (juris.curia.europa.eu)

Relevance

This illustrates an increasingly important point:

A financial-adviser dispute may involve not only fiduciary and suitability duties but also choice-of-law questions.

For cross-border investment advice, the court may need to determine:

applicable law;

consumer status;

financial-instrument classification;

contractual jurisdiction;

mandatory investor-protection rules.

16. Core Fiduciary Duties of a Financial Adviser

A. Duty of loyalty

The adviser must act loyally within the scope of the undertaking.

B. No-conflict duty

The adviser should not place personal interests against the client's interests without properly authorised consent.

C. No-profit duty

The adviser cannot ordinarily make an unauthorised profit from the fiduciary position.

D. Duty to disclose conflicts

Examples include:

commissions;

referral fees;

proprietary products;

related-party investments;

remuneration arrangements.

E. Duty of confidentiality

Client information must not be improperly used for the adviser's own advantage.

F. Duty to follow lawful instructions

A discretionary adviser must operate within the authority granted by the client.

G. Duty of care

The adviser must exercise the level of professional care required by the applicable contract, professional rules and national law.

Importantly, care and fiduciary loyalty are conceptually different obligations.

17. Suitability as a Major Modern Duty

MiFID II requires a suitability assessment for investment advice and portfolio management.

The adviser must consider:

Client knowledge

Does the client understand the product?

Experience

Has the client previously invested in comparable products?

Financial situation

Can the client bear losses?

Investment objective

What is the client trying to achieve?

Risk tolerance

How much risk can the client reasonably accept?

These are not merely theoretical considerations. ESMA states that firms must collect the necessary information and cannot recommend investments where they lack sufficient information to perform the suitability assessment. (esma.europa.eu)

18. Unsuitable Investment Example

Assume a client:

is 70 years old;

seeks capital preservation;

has limited investment experience;

cannot tolerate substantial losses.

The adviser recommends:

highly leveraged derivative products.

Potential allegations could include:

breach of suitability requirements;

breach of contractual duty;

negligence;

breach of fiduciary loyalty if a fiduciary relationship exists;

failure to explain risks;

possible conflict of interest if the adviser receives enhanced commission.

The legal result depends upon applicable national law and the evidence.

19. Conflict of Interest

A classic fiduciary claim arises when the adviser recommends an investment because the adviser benefits personally.

Example

Adviser receives:

1% commission on Product A;

0.1% commission on Product B.

Both products may be suitable.

The adviser recommends A without disclosing the commission difference.

The legal analysis may involve:

MiFID conflict-of-interest rules;

contractual duties;

fiduciary no-profit/no-conflict principles;

national agency law.

If the adviser actually manipulated the client into purchasing an unsuitable product to generate commission, the claim becomes considerably more serious.

20. Secret Commission

A secret commission is particularly important.

The structure may be:

Client → Adviser → Investment

while a hidden payment flows:

Product provider → Adviser

The question is whether the client gave informed consent to the benefit.

FHR provides the leading principle that unauthorised fiduciary profits can be recoverable by the principal.

For financial advisers, the precise statutory treatment of commissions also depends on MiFID II and national implementation.

21. Proprietary Products

An adviser may recommend a product issued by:

its parent company;

affiliated bank;

affiliated investment fund;

affiliated insurance company.

That does not automatically make the recommendation unlawful.

But it creates a potential conflict.

The adviser should properly manage and disclose the conflict according to the applicable regulatory and contractual framework.

22. Independent vs Non-Independent Advice

MiFID II distinguishes different forms of investment advice.

Where a firm describes itself as providing independent advice, additional regulatory requirements apply.

The client should not be confused about whether the adviser is:

independent;

tied to a particular provider;

recommending a restricted product universe.

The delegated MiFID rules require firms to avoid ambiguity concerning whether advice is independent or non-independent. (Eur-Lex)

23. Automated/Robo-Advice

Modern financial advice increasingly uses:

algorithms;

robo-advisers;

automated portfolio construction;

AI risk profiling.

MiFID rules expressly recognise that suitability assessments can be provided through automated or semi-automated systems, while responsibility for suitability remains with the investment firm. (Eur-Lex)

This creates an important principle:

Automation does not automatically transfer legal responsibility away from the investment firm.

If a firm's robo-adviser systematically recommends unsuitable investments, the firm may still face regulatory and potentially civil consequences.

24. Fiduciary Breach Through Algorithmic Advice

Consider:

Client profile: conservative
↓
AI profile: high-risk
↓
Portfolio recommendation: leveraged derivatives
↓
Client loses €500,000

Potential questions:

Was the client profile correctly recorded?

Was the algorithm properly validated?

Did the firm collect sufficient information?

Was the recommendation suitable?

Did human advisers supervise the system?

Did the firm have a conflict?

Was the AI designed to favour products generating higher fees?

Was the client warned?

The existence of an algorithm does not eliminate the firm's regulatory responsibilities.

25. Causation

A breach does not automatically mean that all investment losses are recoverable.

The claimant may need to establish:

Duty
↓
Breach
↓
Causation
↓
Loss

For example:

Adviser recommended unsuitable Fund A.

But Fund A happened to increase in value.

The claimant may have difficulty establishing financial loss.

Conversely:

Adviser recommended unsuitable Fund A → client suffered substantial loss.

The claimant may still need to establish what would probably have happened if proper advice had been given.

26. Loss Calculation

Possible methods include comparison between:

Actual position

What the client actually owns after the adviser’s recommendation.

Hypothetical proper-advice position

What the client would probably have invested in had proper advice been given.

The difference may form part of the claimed loss, subject to national causation and damages rules.

Other possible claims may include:

advisory fees;

transaction costs;

financing costs;

tax consequences;

interest.

27. Disgorgement vs Compensation

This is a critical fiduciary-law distinction.

Compensation

Attempts to compensate the client for actual loss.

Disgorgement/account of profits

Attempts to strip an unauthorised profit obtained through the fiduciary position.

FHR is especially important for the second category.

Therefore, even if the client cannot demonstrate a conventional investment loss, an unauthorised fiduciary profit may raise a separate restitutionary issue.

28. Rescission

Depending upon the jurisdiction and circumstances, a conflicted transaction may potentially be rescinded.

But rescission is not automatic.

Relevant issues may include:

informed consent;

affirmation;

third-party rights;

practicality of restoration;

statutory provisions;

delay.

29. Regulatory Breach and Civil Claim

This distinction is essential.

Suppose:

Adviser violates MiFID II suitability requirements.

That does not necessarily mean:

Client automatically wins damages.

The claimant must determine whether the applicable national legal system gives the regulatory breach a private-law consequence.

Possible routes include:

contractual claim;

tort/delict;

statutory damages;

restitution;

fiduciary/equitable remedies.

Genil 48 illustrates the distinction: the CJEU interpreted the MiFID suitability framework but left the consequences of non-compliance to the relevant national legal system. (Eur-Lex)

30. Standard of Proof

A claimant may need to establish:

1. Existence of duty

Was the adviser actually acting as adviser/fiduciary?

2. Breach

What exactly did the adviser do wrong?

3. Causation

Did the breach cause the investment loss?

4. Quantum

How much loss resulted?

5. Contributory conduct

Did the client knowingly disregard warnings?

31. Client's Own Conduct

Suppose the adviser clearly warns:

"This investment is unsuitable for you."

The client insists on proceeding independently.

That can significantly alter the liability analysis.

ESMA distinguishes situations involving clients who insist on proceeding contrary to the firm's suitability assessment. (esma.europa.eu)

But an adviser cannot necessarily manufacture an "insistent client" situation by:

deliberately manipulating the client profile;

hiding the risk;

pressuring the client;

presenting an unsuitable product as appropriate.

ESMA expressly identifies such practices as problematic. (esma.europa.eu)

32. Financial Adviser vs Broker vs Portfolio Manager

33. Cross-Border European Claims

A financial adviser may be located in:

France

while:

client lives in Germany;

bank is incorporated in Luxembourg;

fund is domiciled in Ireland;

investment account is in Switzerland.

The dispute may therefore involve:

Brussels I Recast;

Rome I;

MiFID II;

consumer protection;

mandatory rules;

national fiduciary law.

The 2026 FIBO Markets judgment illustrates how classification of financial-instrument rights can affect the Rome I analysis in cross-border consumer financial contracts. (juris.curia.europa.eu)

34. Important Evidence

A client bringing a fiduciary-duty claim should preserve:

advisory agreement;

client risk profile;

suitability report;

investment proposal;

emails;

recorded telephone calls;

commission disclosures;

fee schedules;

portfolio statements;

transaction confirmations;

conflict-of-interest disclosures;

internal adviser communications where discoverable;

financial-product documents;

risk warnings;

evidence of the client's financial objectives.

MiFID II specifically requires firms to maintain records and provide suitability documentation. (esma.europa.eu)

35. Major Defences

An adviser may argue:

No fiduciary relationship

The relationship was ordinary commercial contracting.

No breach

The advice complied with the agreed mandate.

Full disclosure

The client was fully informed of the commission/conflict.

Informed consent

The client knowingly accepted the conflict.

No causation

The investment loss resulted from market conditions rather than the breach.

Client's independent decision

The client rejected or departed from the advice.

Limitation

The claim was brought outside the applicable limitation period.

36. Comparative Case Table

37. Six Core Rules for Examination

Rule 1

Financial adviser status alone does not automatically establish fiduciary status.

Rule 2

The central fiduciary obligation is loyalty.

Rule 3

A fiduciary must generally avoid conflicts and unauthorised profits.

Rule 4

MiFID II separately imposes suitability, information and conduct-of-business obligations.

Rule 5

A regulatory breach does not automatically establish a private damages claim; national law determines many civil consequences.

Rule 6

The claimant must normally establish breach + causation + legally recoverable loss, unless seeking a distinct restitutionary/fiduciary remedy such as an account of an unauthorised profit.

38. Practical Hypothetical

Suppose a wealth adviser tells a client:

"Fund A is the best investment for you."

The adviser knows:

Fund A is substantially riskier than the client's stated tolerance;

Fund A pays the adviser a large commission;

Fund B would better match the client's objectives.

The adviser does not disclose the commission.

The client invests €1 million and loses €300,000.

Possible legal issues

Fiduciary

conflict of interest;

unauthorised profit;

lack of loyalty.

MiFID

suitability;

conflict management;

disclosure;

suitability report.

Contract

breach of advisory mandate.

Tort/delict

negligent financial advice.

Damages

whether the €300,000 loss was caused by the breach.

Restitution

whether the adviser must surrender an unauthorised commission.

The appropriate remedy depends upon the jurisdiction and precise facts.

39. Conclusion

Financial-adviser fiduciary-duty litigation in Europe sits at the intersection of private fiduciary law, contract law, tort/delict law and EU financial-services regulation.

The most important conceptual distinction is:

MiFID suitability duty is not identical to fiduciary loyalty.

An adviser may breach a regulatory suitability obligation without necessarily being a fiduciary; conversely, a person who is a fiduciary may breach the duty of loyalty through an undisclosed conflict or secret profit even where the underlying investment does not produce a conventional loss.

The European framework therefore operates through several layers:

Client
↓
Adviser / Portfolio Manager
↓
Contractual Mandate
↓
Fiduciary Loyalty
↓
MiFID II Suitability + Conflict Rules
↓
Investment Recommendation
↓
Loss / Unauthorised Profit
↓
Contract + Tort/Delict + Fiduciary/Restitutionary Remedies

The leading authorities establish that personalised investment recommendations trigger important suitability obligations, while modern fiduciary jurisprudence emphasises that fiduciary status depends upon the nature and scope of the undertaking to act loyally for another. (Eur-Lex)

Ultra-short revision formula

Financial Adviser Fiduciary Breach =

Adviser–Client Relationship
→ Undertaking/Agency
→ Duty of Loyalty
→ No Conflict + No Secret Profit
→ MiFID Suitability + Disclosure
→ Breach
→ Causation / Unauthorised Profit
→ Damages / Restitution / Account of Profits / Other Remedies.