Introduction
Supervisory directors oversee the management board and the general course of the company's affairs. The law expects them to probe actively, to test critically and to intervene where the board falls short. A supervisory director who fails to do so risks personal liability, both towards the company and towards third parties. The test largely mirrors that for the managing director: what is decisive is whether the supervisory director can be seriously blamed.
Liability towards the company
The basis for internal supervisory-director liability is Article 2:149 of the Dutch Civil Code (DCC) in conjunction with Article 2:9 DCC. The test is the same as for managing directors: the supervisory director must have performed their duties improperly and must be capable of being seriously blamed, assessed against all the circumstances of the case (Supreme Court 10 January 1997, ECLI:NL:HR:1997:ZC2243, Staleman/Van de Ven). Liability is joint and several: all supervisory directors are in principle liable together.
Exculpation is possible under Article 2:149(2) DCC. The individual supervisory director must show that the failure is not attributable to them and that they were not negligent in taking measures to avert its consequences. That requires evidence of what was actually done, not merely of what was intended. Structural attention to information flows, meeting frequency and record-keeping is therefore essential.
Liability towards third parties
Alongside internal liability towards the company, supervisory directors can also be personally liable to third parties in tort (Article 6:162 DCC). The threshold is high: the supervisory director must personally be seriously blameworthy, along the same line developed for managing directors in Ontvanger/Roelofsen (Supreme Court 8 December 2006, ECLI:NL:HR:2006:AZ0758).
In the Fairstar judgment the Supreme Court confirmed that the internal and the external liability of a supervisory director require a separate assessment and reasoning, even where the underlying facts are the same (Supreme Court 30 January 2026, ECLI:NL:HR:2026:128). That a supervisory director fell short internally in their oversight does not without more make them liable to a third party such as a shareholder or an acquiring party; that liability must be independently substantiated, given the high threshold for personal liability. See also the discussion of the Fairstar judgment.
Liability in bankruptcy
In bankruptcy, supervisory directors can be addressed by the trustee under Article 2:259 DCC for manifestly improper supervision that was an important cause of the bankruptcy. As with directors' liability in bankruptcy, a statutory presumption applies where the bookkeeping duty or the duty to publish the financial statements is breached. To rebut that presumption it is enough for the supervisory director to make it plausible that another, external cause brought about the bankruptcy.
Where things go wrong
Most liability cases against supervisory directors turn on passivity: not requesting financial reports, rubber-stamping resolutions, ignoring warning signals from the accountant, or failing to bring in external advice where the situation calls for it. Fairstar illustrates this: a reasonably thinking supervisory director should have doubted the board's statement that no unconditional obligation had been entered into, and should have probed it. Passive reliance on statements from the board can qualify as improper supervision.
What decides the outcome
Whether a claim against a supervisory director succeeds is rarely decided by the norm alone, but by the evidential position: can the serious blame be concretely substantiated, and does the supervisory director have documented records showing that they did probe and act? For the supervisory director addressed, the defence lies in exculpation and, towards third parties, in the absence of an independently substantiated serious blame.