A company discovers, three months later, that its bank executed without question a series of international transfers to a Hungarian account. A retired Marseille couple learn that the institution which granted them two mortgage loans now reproaches their default, having never warned them of indebtedness they manifestly could not sustain. A struggling business director sees his bank terminate overnight a long-standing overdraft facility, precipitating insolvency. In each case: the same reflex of demanding accountability. But on what precise legal basis? And within what limits?
Bank liability is among the densest areas of business law, constructed at the frontier of three permanent tensions: client freedom versus protection of the weaker party; banker’s management freedom versus duty of oversight; general liability law versus special regimes from European payment services law and anti-money laundering rules. This guide maps the current position – legislation, case law, key trends – as of April 2026.
Foundations of the bank’s liability
There is no single codified “statute” of banker liability in French law. What is called “bank liability” is the application of general contractual liability to a specific profession, enriched by judge-made obligations – vigilance, warning, advice – and framed by special regimes that, for certain operations, displace the general law.
The dominant basis is Article 1231-1 of the Code civil (contractual liability). Where no contract links the victim to the bank, the basis shifts to Article 1240 (tortious liability). On this general framework, three judge-made obligations structure the field: vigilance, warning and advice.
The duty of vigilance: detecting without interfering
The banker must detect apparent anomalies in operations without crossing the line of non-interference. The principle of non-interference was reaffirmed broadly by Cass. com., 14 January 2026 (no. 24-19.102): the bank need not investigate the origin and size of funds paid into accounts where operations appear regular.
Key 2024-2026 rulings draw the contours: Cass. com., 2 October 2024 (no. 23-13.282) held that upon receiving orders presenting apparent anomalies (unusual circumstances, non-SEPA destination, significant amount), the bank must verify with the authorised signatory. Cass. com., 12 June 2025 (no. 24-10.168) approved rejection where transfers remained within agreed daily limits. The triple ruling of 19 November 2025 consolidated the doctrine: vigilance is not a general duty of control; it only requires detecting what would be obvious to a normally diligent professional.
Critical 2026 development: Cass. com., 4 March 2026 (no. 24-19.588, section formation) definitively separates civil vigilance from AML/CTF vigilance. AML obligations under Articles L. 561-4-1 et seq. CMF serve exclusively public-interest purposes and cannot found individual damages claims. Civil liability remains anchored solely to the common-law duty of apparent anomaly detection.
The duty to warn (devoir de mise en garde)
A purely judge-made creation, the duty to warn was consecrated by Cass. ch. mixte, 29 June 2007 (no. 05-21.104): “The bank granting a loan to an unsophisticated borrower owes a duty to warn having regard to their financial capacity and the risks of indebtedness arising from the loan.”
Four cardinal rules: (1) the duty is owed only to the unsophisticated borrower/surety, assessed in concreto; (2) it targets only a characterised risk of excessive indebtedness; (3) the burden of proof lies on the bank; (4) the remedy is damages for loss of a chance.
The duty extends to unsophisticated sureties (Cass. com., 23 September 2014). Limitation runs from the first unregularised payment incident, not from the loan date (Civ. 1re, 5 January 2022).
2026 limits: Cass. com., 25 March 2026 (no. 25-10.353) held that a bank executing an investment transfer acts as payment service provider and owes no duty to warn or advise regarding the underlying investment. The door is closed to extending the duty to all payment acts.
The duty of advice: an exception, not a principle
The duty of advice arises only in three situations: the bank takes initiative in proposing an operation; the bank holds a specific mandate; or the product is of particular technical complexity. Outside these, there is no general duty of advice in credit.
Businesses in difficulty: abusive support and credit withdrawal
Abusive support: Before 2005, liability for maintaining credit to an irremediably compromised business was the pillar of insolvency-related bank litigation. Article L. 650-1 of the Code de commerce reversed this with a principle of non-liability, subject only to three strictly interpreted exceptions: fraud, characterised interference in management, or manifest disproportion of guarantees taken.
Abusive withdrawal of facilities: Article L. 313-12 CMF requires a minimum sixty business days’ written notice for termination of an indefinite-duration non-occasional facility. Breach opens damages for substitution prejudice. Two exceptions only: seriously reprehensible conduct, or irremediably compromised situation.
The PSD2 special regime
For payment operations, PSD2 (Articles L. 133-1 et seq. CMF) creates a closed special regime displacing general contractual liability. Article L. 133-18: immediate reimbursement of unauthorised operations. Cass. com., 4 March 2026 (no. 25-11.959) confirmed that Article 1231-1 does not apply to execution of a conforming order – with one exception: where the provider itself drafts the order before obtaining the user’s approval (e.g. a branch advisor entering the order for an elderly client). For full treatment, see our bank fraud guide.
Building a liability action: method
- Identify the obligation: Vigilance? Warning? Advice? Credit withdrawal? Unauthorised payment?
- Reconstruct the evidentiary chain: Bank records, logs, dialogue forms, solvency assessments
- Quantify prejudice: Real damage for vigilance; loss of chance for warning
- Respect deadlines: Five-year general limitation; thirteen-month forfeiture for unauthorised payments
- Choose the procedural route: Written complaint, then banking mediator, then court (refere if urgent)
Solent Avocats accompanies individuals and businesses in the analysis and conduct of bank liability actions. See our banking law guide for the broader framework.