Tuna brands make sustainability claims all the time. But most of them can’t actually prove those claims when a retailer, regulator, or journalist asks for documentation. If you want your sustainability messaging to hold up, you need more than good intentions. You need verifiable data tied to specific batches, vessels, and certifications. Here are five claims tuna brands can legitimately make, and what it takes to back each one up.
Why most tuna sustainability claims fall flat
The problem isn’t that brands are lying. It’s that the documentation behind their claims is often incomplete, scattered across spreadsheets, or only assembled after the fish has already moved through several hands. By the time a product reaches a retailer’s shelf, the original catch data may be weeks old, stored in a different format, or simply unavailable.
Retailers and regulators are getting stricter. Jurisdictions such as the EU and the USA have introduced or are advancing import regulations that require documented proof of legal, sustainable sourcing. Brands that rely on verbal assurances or paper-based records could face serious compliance gaps. The five claims below are ones that buyers and consumers actually care about, and each one requires a specific type of evidence to be credible.
1: Claim legally caught, IUU-free fish
This is the most important claim in ethical seafood sourcing, and also the hardest to prove without first-mile data. IUU fishing (illegal, unreported, and unregulated) is a persistent problem in global tuna supply chains, and the risk of unknowingly sourcing IUU product is real for any brand buying from multiple vessels or through intermediaries.
To make this claim credibly, you need vessel-level tracking data from the moment a fishing trip begins. Satellite VMS and AIS records show where a vessel fished, for how long, and whether it operated within authorized zones. Cross-referencing that data against RFMO registries, IUU blacklists, and PSMA port state records gives you documented proof that a specific catch was legal.
Without that first-mile verification, the claim is essentially unsubstantiated. A brand that can show batch-level vessel tracking tied to regulatory database checks is in a fundamentally different position than one relying on supplier declarations alone.
2: Claim MSC or ASC certified sourcing
MSC and ASC certifications are well-recognized by retailers and consumers, but having a certificate on file is not the same as proving chain of custody for a specific product lot. Certification fraud and certificate misuse do occur in seafood supply chains, and some buyers have been caught sourcing non-certified product under a certified label.
A credible MSC or ASC sourcing claim requires active verification of the certificate’s validity at the time of purchase, not just a one-time check at onboarding. That means automating lookups against the MSC and ASC certificate databases for each batch, and linking the result to a unique Raw Material ID that follows the product through processing.
This kind of automated, batch-level certificate verification makes your claim auditable. If a retailer or certification body asks for proof, you can pull up documentation for a specific lot rather than pointing to a general supplier agreement.
3: Claim ethical labor and crew welfare standards
Labor conditions on fishing vessels are increasingly on the radar of retailers, NGOs, and regulators. Forced labor, debt bondage, and unsafe working conditions have been documented on vessels supplying major tuna brands, and some of those brands have faced significant reputational and legal consequences as a result.
Making a credible crew welfare claim means integrating social compliance evidence directly into your traceability records. Relevant certifications include BSCI/Amfori, SEDEX/SMETA, Fair Trade USA, and the FISH Standard for Crew. Observer and electronic monitoring (EM) reports can provide additional independent verification of conditions at sea.
The key is linking this evidence to specific vessel trips and batches, not just holding general supplier certifications. When satellite analytics, EM data, and human observer records are combined, they provide an independent picture of labor conditions at the first mile, which is where the risk is highest and the documentation is most often missing.
4: Claim full supply chain traceability
Full traceability means being able to follow a product from the consumer package back to the vessel that caught it, including every processing step, transshipment, and logistics handoff in between. This is the claim that regulators are increasingly requiring, and the one that most brands struggle to deliver in practice.
Genuine end-to-end traceability requires a system built on interoperable data standards. GS1-EPCIS and GDST-compatible platforms allow data to be shared and verified across different supply chain partners without losing integrity. Each batch needs a unique identifier that carries origin, composition, and verification data through every step, not just a paper trail that gets reconstructed after the fact.
Automated completion of regulatory documentation, such as EU CATCH forms, US SIMP, and US FSMA forms, is a practical indicator of whether a traceability system is genuinely comprehensive. If your platform can auto-populate those forms from existing batch data, it means the underlying data is structured, complete, and reliable.
5: Claim consumer-facing sustainability transparency
Consumer-facing transparency goes beyond a sustainability paragraph on your website. It means giving shoppers access to verifiable information about the specific product they are holding, including where the fish was caught, by which vessel, under what certification, and under what labor conditions.
Digital Product Passports, accessible using a traceability code on packaging, make this possible. When the traceability code links to a live, data-backed record rather than a static marketing page, the claim becomes meaningful. Consumers and journalists can verify the information themselves, which is a significant credibility upgrade over conventional sustainability labeling.
For brands, this level of transparency also serves as a competitive signal to retailers. Buyers increasingly ask for documented proof of ethical sourcing as part of their own due diligence. A Digital Product Passport backed by real traceability data is a practical answer to that request.
Turning claims into competitive advantage
Each of the five claims above is achievable. What separates brands that can prove them from those that can’t is whether their traceability data starts at the first mile or is assembled downstream. Documentation built after the fact is always weaker than data captured at the source.
SmarTuna’s digital traceability platform is built specifically to capture and verify supply chain data from the moment a fishing trip begins, linking vessel records, certification checks, social compliance evidence, and logistics data to a unique Raw Material ID per batch. That means every claim your brand makes, whether about legality, certification, labor standards, or consumer transparency, can be backed by auditable, real-time documentation rather than supplier assurances.
Sustainability claims are only as strong as the data behind them. Brands that invest in verified, first-mile traceability now are building a position that will be much harder for competitors to replicate once regulatory requirements make it mandatory.
[seoaic_faq][{“id”:0,”title”:”How do I know if my current traceability system is strong enough to back up sustainability claims?”,”content”:”A reliable test is to ask whether you can pull up documented, batch-level evidence for a specific product lot within minutes — including vessel tracking data, certification validity at the time of purchase, and social compliance records. If your answer involves reconstructing records from spreadsheets, chasing supplier emails, or pointing to general agreements rather than lot-specific data, your system likely has gaps that would not hold up under retailer or regulatory scrutiny. Platforms built on standards like GS1-EPCIS and GDST compatibility are a strong indicator that your data is structured well enough to be auditable.”},{“id”:1,”title”:”What is the biggest mistake tuna brands make when building their sustainability documentation?”,”content”:”The most common mistake is starting data capture too far downstream — at the processor or importer level rather than at the vessel. By the time a batch reaches a cannery or distribution hub, critical first-mile data such as VMS/AIS vessel tracks, port state records, and observer reports may already be lost or unavailable. Sustainability claims built on documentation assembled after the fact are inherently weaker and far more vulnerable to challenge. Capturing data at the source, from the moment a fishing trip begins, is what makes claims genuinely defensible.”},{“id”:2,”title”:”Which regulations should tuna brands be most urgently preparing for right now?”,”content”:”Three frameworks deserve immediate attention: the EU’s import regulations targeting IUU fishing and forced labor in supply chains, the US Seafood Import Monitoring Program (SIMP), and the US FDA’s Food Safety Modernization Act (FSMA) traceability requirements. All three place the burden of documented proof on the importer or brand, not just the supplier. Brands selling into or planning to enter EU or US markets should be assessing their documentation gaps now, as retroactive compliance is significantly harder and more costly than building the right systems in advance.”},{“id”:3,”title”:”Can a small or mid-sized tuna brand realistically implement first-mile traceability, or is this only feasible for large players?”,”content”:”First-mile traceability is increasingly accessible to brands of all sizes, particularly as cloud-based platforms replace the need for custom-built infrastructure. The key is choosing a system that integrates with existing data sources — such as vessel VMS feeds, RFMO registries, and certification databases — rather than requiring a brand to collect raw data independently. Smaller brands often have an advantage in that they work with fewer vessels and suppliers, which makes it more straightforward to establish verified data flows from the start. The upfront investment is far smaller than the potential cost of a compliance failure or reputational crisis.”},{“id”:4,”title”:”How does a Digital Product Passport actually work in practice, and what data should it include?”,”content”:”A Digital Product Passport is typically accessed via a QR code printed on the product packaging, which links to a live, data-backed record rather than a static webpage. For tuna, a credible passport should include the vessel name and flag state, catch date and fishing zone, gear type, relevant certifications with verified validity dates, and available social compliance information for the vessel. The critical distinction is that the data should be pulled dynamically from your traceability system rather than manually written and uploaded — this ensures the information is accurate, current, and independently verifiable by consumers, journalists, or retail buyers.”},{“id”:5,”title”:”What is the difference between a supplier declaration and verified traceability data, and why does it matter?”,”content”:”A supplier declaration is a written statement from your supplier asserting that their product meets certain standards — it is essentially a promise, not proof. Verified traceability data, by contrast, consists of independently sourced records such as satellite vessel tracks, cross-referenced RFMO registry entries, and automated certificate database lookups that confirm the same facts without relying solely on the supplier’s word. The distinction matters enormously under modern regulatory frameworks and retailer audits, which increasingly require evidence that can be independently corroborated. In cases of IUU fishing or labor violations, supplier declarations have repeatedly proven insufficient to protect brands from legal and reputational consequences.”},{“id”:6,”title”:”How should a tuna brand prioritize which of the five claims to tackle first?”,”content”:”Start with IUU-free sourcing verification, as it is the most legally consequential claim and the foundation on which the others depend — you cannot credibly claim certified or ethical sourcing if you cannot first confirm the catch was legal. From there, MSC/ASC certificate verification is the logical next step since it directly supports retailer conversations and is relatively straightforward to automate. Labor and crew welfare documentation and full supply chain traceability can be built in parallel as your data infrastructure matures. Consumer-facing transparency via Digital Product Passports is best introduced once the underlying data is solid, so that what you publish to consumers is genuinely accurate and auditable.”}][/seoaic_faq]