Building confidence in sustainable procurement: Why independent verification matters
In New Zealand, sustainable procurement is at an inflection point. The direction of travel is obvious:
- Modern slavery legislation is coming
- Greenwashing scrutiny is rising
- Investor and customer expectations are hardening
Most corporates can see what’s coming; yet many procurement systems haven’t caught up.
The risk already sits in your supply chain
For large organisations, the majority of sustainability impacts sit outside direct operations, it’s in what they buy. That includes:
- Emissions embedded in materials, logistics and services
- Labour practices across supplier tiers
- Environmental impacts across product lifecycles
This creates a simple yet uncomfortable reality: companies are accountable for many impacts they don’t directly control. That issue can be managed when buyers have credible ways to assess and influence suppliers. Right now, many organisations don’t yet have those systems in place.
Why current approaches fall short
The standard playbook tends to rely on:
- Supplier self-declarations
- Codes of conduct
- Questionnaires and occasional audits
These tools have value. But they rely heavily on trust and interpretation. They struggle to answer a basic question: Is this supplier actually performing to a credible sustainability standard? And that’s where greenwashing risk often creeps in, unintentionally. That happens not because companies are careless, but because the system relies on claims rather than evidence.
We’re starting to see this increasingly tested in New Zealand. The Commerce Commission has already warned companies, with Kmart being a high-profile example, that unsubstantiated environmental claims are misleading and may breach the Fair Trading Act. That case regarded “100% sustainable cotton” claims and shows that the regulator is looking at supply chain transparency. That case is a consistent signal of the overall direction of travel, both here and overseas, and not an outlier.
The Financial Markets Authority (FMA) has also sharpened its focus on “green washing” in the financial sector, clarifying that it is illegal under the Financial Markets Conduct Act 2013. The FMA is actively targeting KiwiSaver funds and investment products that overstate ESG credentials.
That said, at least for now, New Zealand’s regulatory approach is still more reactive than proactive compared to international peers like the EU and Australia, placing greater reliance on consumer complaints and self-regulation rather than on mandatory pre-market vetting. Companies wanting to portray a more proactive approach to sustainability, and those that have built a reputation upon it, would be well-advised to question how long that approach may endure.
Legal actions by activist organisations are also on the rise. Action by NGOs such as Consumer NZ and Lawyers for Climate Action NZ (LCANZI) is increasing in frequency, targeting companies in the High Court.
Against this backdrop, the Government has overhauled its procurement rules, effective 1 December 2025, shifting sustainability from an explicit requirement to one of several optional considerations. With public procurement accounting for roughly 20% of New Zealand’s GDP, this shift has significant implications. Without clear sustainability requirements, there is a real risk that cheaper, non-certified products win on upfront price alone, despite often carrying higher whole-of-life costs.
The role of Type 1 ecolabels: moving from claims to evidence
This is where Type 1 ecolabels fundamentally change the game. Under ISO 14024, they are designed to provide:
- Independent verification: assessment by a third party, not the supplier
- Multi-criteria standards: covering a range of environmental (and often social) impacts
- Lifecycle thinking: not just one attribute or stage
- Ongoing compliance: not a one-off badge
In New Zealand, Eco Choice Aotearoa operates the only recognised Type 1 ecolabel. The critical shift with this type of ecolabel credentials is simple: You move from trusting what suppliers say to relying on what has been independently verified, which provides more effective risk management – as well as opportunities to enhance reputation.
Why independent verification matters (more than anything else)
This is the piece that most Eco Choice Aotearoa partners value the most. Independent verification isn’t just a technical detail; it’s the difference between a claim you have to defend and a position you can stand behind. It delivers three practical advantages:
- Credibility
You reduce the time cost of doing all the due diligence yourself. There is a defined, transparent standard and a third-party assessment behind it, where the ecolabel does the hard work for you. - Defensibility
If claims are challenged by regulators, media, or stakeholders, you have evidence that due diligence was based on recognised, independent criteria. - Consistency
Procurement decisions are no longer case-by-case judgments. They are anchored to a common benchmark.
Introducing Eco Choice Aotearoa’s Sustainable Procurement Toolkit
Recognising that most organisations don’t just need standards but practical ways to apply them, Eco Choice Aotearoa has developed its Sustainable Procurement Toolkit in partnership with the New Zealand Procurement Excellence Forum and TCO Development. The intent of the toolkit is straightforward: make credible, sustainable procurement easier to implement at scale.
The toolkit supports organisations to:
- Integrate ecolabels into procurement policies and processes
- Use ecolabel certification as a decision-making filter, not just a reference point
- Apply consistent criteria across categories and suppliers
- Reduce reliance on bespoke, resource-heavy assessments
In effect, it turns ecolabels into a working part of procurement systems, rather than something sitting on the side.
The strategic upside for corporates
Done well, this approach is not just about risk mitigation; it actually unlocks tangible business value:
- Reduced due diligence burden: Less time spent interrogating individual supplier claims
- Lower exposure to greenwashing risk: Decisions backed by independent verification rather than interpretation
- Stronger supply chain signals: Clear expectations that shift supplier behaviour over time
- More efficient procurement processes: Standardised criteria that scale across the organisation
- Better alignment with what’s coming: Particularly around supply chain transparency and modern slavery
This is where sustainable procurement moves from compliance thinking to operational advantage.
A window of opportunity
New Zealand corporates are in an interesting position. Regulation isn’t forcing the issue — yet. But that creates an opportunity to move forward on the front foot to:
- Build and implement systems before problems occur.
- Shape and influence supplier markets to support and align with your values
- Avoid the reactive scramble seen in other jurisdictions as legislative controls inevitably tighten.
The message is simple: either use this period to get ahead or risk having to catch up later under pressure.
Continuing the conversation: Sustainable procurement in action
Tonkin + Taylor is hosting a breakfast session with Eco Choice Aotearoa on 22 April at our Auckland offices, focused on how the Sustainable Procurement Toolkit can be applied in practice. This is a great opportunity to see what good, credible practice looks like in procurement. Find out more and register for the Sustainable Procurement in Action event here.
The bottom line – just better
Sustainable procurement has always mattered. What’s changing is the level of scrutiny and the consequences of getting it wrong. Type 1 ecolabels and the independent verification behind them offer something most organisations are missing: a credible, scalable way to turn intent into evidence. In addition to limiting supply chain risk, sustainable procurement offers a fast track to achieving environmental, social and governance (ESG) goals. It’s not about making better claims about your products but having better proof of how good they are.
About the Author
Simon Harvey | Principal Consultant – Strategic Sustainability, Tonkin + Taylor
Simon is a versatile sustainability specialist with a laser focus on practical approaches to strategy development, measurement and reporting that unlock new value. He has 20 years of experience working with small, medium, and large organisations in both the public and private sectors to develop informed responses to sustainability challenges that complement broader enterprise objectives.
Read more from Simon here:
Good Growth: Accelerating sustainable infrastructure investment
Good Growth: Converging systems for a low-carbon future
