In Short:
This article looks at the importance of singing briefs:
- When a brief is approved by everyone, it’s owned by no one. Adding a “Signed by” line creates accountability and sharper strategic thinking.
- A single signature triggers a behavioural shift: people read more carefully and commit more fully.
- Treating the brief as a signed commercial contract leads to stronger ideas and fewer wasted rounds.
- Signing the brief also leads to positive impacts like clearer evaluation of the work.
BetterBriefs is calling for a new discipline for marketers: add “Signed by” to your briefs. When one person signs and owns the brief, the quality of thinking — and the work that follows — improves dramatically.
Marketing has always been a team sport. And while that diversity of perspective often strengthens strategy, collaboration can also unintentionally create a weakness.
When a brief is reviewed by many people, responsibility is shared across the team. So when small changes are made that lead to ambiguities or soften its decision making, they often go unchallenged.
But when the buck stops with one person, and they’re asked to sign their name to that effect, they stop being just another reviewer and become accountable.
Why a signature matters
When you sign your name on a document, your brain shifts from "considering" to "committed." Behavioural economists call this the commitment escalation effect. Studies have found that people who physically sign their name are significantly more likely to follow through compared with those who only give verbal approval.
Signing activates a different part of the brain – the part that recognises responsibility, accountability and consequence. When you sign a brief, you’re no longer reviewing it. You’re committing to it. And commitment is the missing ingredient in most marketing processes.
When someone signs a brief, they're saying:
- I'm responsible for the strategic decisions made in this brief
- I vouch for the clarity of this strategy
- I stand behind the objectives and the vision of success for this activity
- I'm the decision-maker if questions arise
That level of commitment changes their behaviour. They’re likely to challenge tweaks that weaken the brief. They’ll ask harder questions because their name will be attached to what happens next.
A brief is a contract, so treat it like one
Marketers often forget what a brief really is: a commercial contract. It outlines the strategic goal, the constraints, the audience, the message and the criteria for success. It’s the formal request for the work that follows. And just like any other formal request – like new employee contracts or NDAs – the brief must be signed by both parties before the agency’s ideation begins.
But what about collaboration?
This approach doesn't remove collaboration. Stakeholders should still contribute their expertise. But instead of being written by committee, all input flows to one accountable owner who:
- Integrates perspectives
- Resolves trade-offs
- Makes final decisions
- Signs the brief
The marketer responsible for signing the brief doesn't need to be the most senior person. They need to be the person closest to the work, who understands the strategy driving the brief and will work with the agency throughout the project until the effectiveness of the investment made is measured.
If strategic priorities change later, the brief can be revised and re-signed. The BetterBriefs Project research found that 9 out of 10 briefs change after being briefed in. That's 90% of projects where the agreement changed mid-execution. A signed brief doesn't prevent changes, but it makes them more conscious decisions rather than casual drift.
Why this improves performance
Clear ownership at the start has a compounding effect throughout the project. Our research also shows agencies are twice as energised by briefs with clear strategic direction. That energy translates to stronger ideas.
Idea evaluation improves too. Currently, only 23% of organisations use the brief when assessing ideas according to the BetterIdeas Project research. That's partly because briefs are too vague to evaluate against. But it's also because unsigned briefs don't feel binding.
A signed brief becomes the evaluation yardstick. Not "do I like it?" but "does it solve the problem we signed up to solve?"
How to implement it
For marketing teams wanting to adopt the signed-brief discipline, we suggest using this framework:
1. Assign one accountable owner at project start
This should be the person who will work most closely with the agency and who has the authority to make decisions. Usually, this is the marketer who wrote the brief.
2. Gather input during drafting
Stakeholders contribute their perspectives. The brief owner integrates this input, resolves ambiguities, contradictions or conflicts, and ensures the brief reflects a single, coherent direction.
3. Before work begins, the owner signs and dates the brief
Digital signatures work fine. The behavioural signal matters more than the format. Consider adding this line to the bottom: "By signing this brief, I confirm the strategy is clear, the objectives are defined and this document provides sufficient direction to proceed." The brief owner should ask the agency to co-sign this as well.
4. Treat material changes as new versions
If objectives, audience or scope shift significantly, revise the brief and re-sign it. This keeps everyone aligned and creates a record of what changed and why.
The signature test
Ask yourself: would you be willing to sign the last brief you sent? If the answer is no, it could mean that even you don't think it's clear enough. And if you won't commit your name to it, why should your agency commit their best work to it?
The marketers who do sign briefs will inevitably write better briefs. Not because signing magically improves quality, but because knowing your name is attached changes how carefully you read, how hard you question and how much you own what happens next.
Pieter-Paul von Weiler is the co-founder of BetterBriefs, an advisory and training business that helps marketers write better briefs and deliver more impactful ideas. A highly awarded former agency strategist, having worked at Publicis Amsterdam, Publicis London, Saatchi & Saatchi and AJF Partnership. Pieter-Paul has served as an Effie judge across Australia and APAC for over a decade.
Together with co-founder Matt Davies, he wrote the BetterBriefs Project and The Best Way for a Client to Brief an Agency, a practical guide for marketers to improve the quality of briefs, co-authored by Mark Ritson and published in partnership with the Institute of Practitioners in Advertising (IPA). Pieter-Paul (together with Matt) also led the BetterIdeas Project, a global study exposing the poor state of the creative evaluation process. The study aims to improve the creative decision-making and evaluation practices and was launched in partnership with the World Federation of Advertisers (WFA) and the IPA.