Last updated: 27 July 2026
These terms apply to every proposal and engagement between Heerden & Co and its clients. Heerden & Co works with businesses only (B2B); these terms are not written for consumers.
These terms apply to all proposals, agreements and services of Heerden & Co, unless expressly agreed otherwise in writing. Any general terms or purchasing conditions of the Client are excluded.
The free 20-minute fit call is non-binding and creates no agreement. An engagement comes into being when the Client accepts a proposal in writing (including by email) and these terms. No strategy or diagnosis is given before an engagement starts — that is the work itself.
Heerden & Co designs and installs marketing operating systems and hands the controls to the Client's own team. Heerden & Co is an independent operator and adviser. It does not execute paid media, run advertising accounts, or act as a media agency; where the Client needs media execution, that is arranged separately with a third party.
Heerden & Co provides its services to the best of its professional ability (an obligation of effort, inspanningsverplichting), not as a guarantee of any specific commercial result, save for the specific guarantee in section 8.
For the Blueprint, Heerden & Co gives one guarantee: "I name your single biggest growth constraint, or the Blueprint is free." If Heerden & Co does not deliver a named constraint with the evidence behind it, the Blueprint fee is refunded. The guarantee covers the naming of the constraint; it is not a guarantee of any particular business outcome from acting on it. It applies provided the Client gave reasonable access to the data, accounts and people needed to do the work.
On full payment, the Client owns the Deliverables created specifically for it (the Constraint Report, roadmap, one-pager and recordings of its own engagement). Heerden & Co retains all rights in its underlying methods, frameworks, templates, tools and know-how, and may reuse these for other clients. Heerden & Co grants the Client a perpetual licence to use the Deliverables internally.
Each party keeps the other's confidential information confidential and uses it only for the engagement. Heerden & Co will not disclose Client data or name the Client publicly (for example as a case study) without the Client's prior consent.
Personal data is handled in line with our Privacy Policy. Where Heerden & Co processes personal data on the Client's behalf, our Data Processing Agreement applies.
Heerden & Co is not obliged to perform if prevented by circumstances beyond its reasonable control, including illness, failure of third-party services, and government measures.
Fixed-scope engagements end on delivery. The Operating System (ongoing retainer) runs month to month unless the proposal states otherwise, and either party may end it with one calendar month's notice, without prejudice to fees due for work performed.
Heerden & Co may update these terms. The version in force at the start of an engagement applies to that engagement. The most recent version is always available on this site.
These terms and all engagements are governed exclusively by Dutch law. Disputes are resolved as far as possible by mutual discussion; failing that, they are submitted to the competent court in Haarlem (Rechtbank Noord-Holland).
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