Tier 2 Is Where Grievance Mechanisms Have to Work Next.

The regulatory floor stops at Tier 1. The exposure sits upstream. Buyers moving there now are ahead of the law and closer to the risk.

The 2025 sustainability reporting cycle is showing the direction of travel. Buyers are naming Tier 2 as a 2026 priority and disclosing the worker engagement tools they use at Tier 1. ASICS' 2025 Sustainability Report is one public example — announcing expansion of human rights risk management to Tier 2 suppliers (Asics Sustainability Report 2025, p. 24) and naming Labor Solutions' WOVO app as part of its Tier 1 grievance and complaint mechanism at strategic factories in Cambodia, Vietnam, and Taiwan (p. 29). It is not the only such example. It is a signal of where the field is going.

Regulation is not driving this. The CSDDD, the German Supply Chain Act (LkSG §8), and the EU Forced Labour Regulation (Regulation (EU) 2024/3015) all set Tier 1 as the compliance floor. Tier 2 is not required. Buyers going upstream are choosing to, because that is where a growing share of the risk actually sits.

And Tier 2 is where grievance mechanisms are thinnest.

Tier 2 grievance mechanisms carry a different load than Tier 1

At Tier 1, a buyer has a direct commercial relationship, a named site, contract language, and — usually — a grievance channel workers can be told about during onboarding. Even at that level, effectiveness is uneven: worker voice surfaces serious risks in 35% of sites that had already passed audit.

Tier 2 introduces four structural changes at once. The buyer has no direct contract with the site. The workforce is often more migrant, more contracted, and more linguistically fragmented. The channel — if one exists — is usually operated by the Tier 1 supplier, not the buyer. And the workers are less likely to know the buyer exists, let alone which channel connects to it.

Every one of UNGP Principle 31's eight effectiveness criteria — legitimate, accessible, predictable, equitable, transparent, engagement and dialogue, rights-compatible, and continuous learning — has to be evidenced under these conditions. None of them get easier upstream.

CSDDD sets Tier 1 as the floor. The exposure sits upstream.

The regulatory picture is precise, and it is worth being precise back.

CSDDD Article 9 requires effective grievance mechanisms across the chain of activities, with the strongest obligations at Tier 1 and a risk-based extension beyond. LkSG §8 requires a complaints procedure accessible to workers in the buyer's own operations and direct suppliers. The EU Forced Labour Regulation, effective 14 December 2027, applies to any product placed on the EU market — meaning risk originating at Tier 2 or beyond can still trigger enforcement at the border, and a buyer has 30 working days in the preliminary phase to respond with evidence.

The pattern across all three is the same: mandate at Tier 1, exposure at Tier 2 and beyond. A buyer who meets the Tier 1 floor and stops has closed the compliance gap and left the risk gap open.

Accessibility fails first when the site isn't your direct supplier.

Under Principle 31, accessibility means workers can find the mechanism and use it without barriers. At Tier 2, four barriers stack.

Language coverage. Tier 2 workforces routinely include languages Tier 1 channels do not serve — migrant languages, minority languages, and dialects that do not appear in the buyer's HR materials. A channel that runs in the site's official language reaches management. A channel that runs in the languages workers actually speak reaches workers.

Channel operator. If the channel is operated by the Tier 1 supplier that also holds the commercial relationship with the Tier 2 site, workers raising a concern are raising it to someone with a business interest in resolving it quietly. UNGP Principle 31 requires the channel to be trusted — trust is not asked of workers, it is evidenced by them.

Line of sight to the buyer. A worker who does not know which brand ultimately buys the product cannot raise a concern to that brand's system, even where one exists. Buyer visibility is a design decision that has to be made at deployment, not assumed.

Retaliation exposure. Tier 2 workers are often on shorter contracts and less visible to the buyer's own oversight. The consequence of raising a concern is closer to the surface. Anonymity and independence of the channel matter more here, not less.

Predictability and engagement have to cross a contractual layer.

Principle 31's predictability criterion asks that workers understand the process and experience it consistently. At Tier 2, the process usually runs through the Tier 1 supplier before it reaches the buyer, if it reaches the buyer at all. A worker who raises a concern does not see what happens after it leaves the site. Consistency across cases is difficult to establish and harder to evidence.

Engagement and dialogue is the criterion that most often fails silently at Tier 2. Worker representation structures at Tier 2 are less mature. Collective mechanisms are less common. The dialogue channel between workers and management is weaker, and the dialogue channel between Tier 2 workers and the buyer typically does not exist at all.

Closing these gaps is not a matter of extending a Tier 1 policy document to Tier 2. It requires a channel designed for the upstream context — its own accessibility work, its own trust-building, its own reporting flow that returns grievance data to the buyer rather than around it.

Grievance data at Tier 2 has to flow back to the buyer, not around it.

The output of a working Tier 2 grievance mechanism is not just resolution at the site. It is intelligence at the portfolio. A buyer extending grievance mechanisms upstream is building a data flow that surfaces where in the value chain the exposure sits, which Tier 2 sites are producing signals that Tier 1 audits missed, and where remediation resources should go first.

This is what WELL Cycle is designed to produce: a site and portfolio risk view grounded in worker voice, layered with site context and structured self-reflection. It is where grievance data stops being a compliance record and becomes strategic intelligence.

ASICS' 2025 disclosure describes the WOVO app — a Labor Solutions platform — as one such tool at Tier 1, noting that it "aims to improve communication between factory management and employees, leading to reduced human rights risks and improved factory performance" (ASICS Sustainability Report 2025, p. 29). Under CSDDD, that intelligence is disclosable. Under the EU Forced Labour Regulation, it is what a buyer will need to produce in the 30-working-day preliminary phase. Under CBP's June 2026 consolidated forced labor enforcement guidance, it is the documentation that meets the clear-and-convincing evidence standard.

The buyers building this flow now are not doing it because the law requires it. They are doing it because the risk is already there, and the record is not.

Tier 2 grievance integrity uses the same instruments as Tier 1, adapted for the upstream context.

Labor Solutions has run the WELL Cycle across 50 strategic and high-risk manufacturing sites in six countries at Tier 1, reaching more than 100,000 workers and evidencing all eight UNGP Principle 31 criteria. Six months after WELL Action Plans were issued, 83% of sites had completed their assigned actions and 72% had progressed to the next maturity level on grievance mechanisms.

The same instruments — the WELL Worker Survey for worker experience, the WELL Self-Diagnostic Tool for management systems — extend to Tier 2 with adaptations for the upstream context. Language coverage. Migrant worker sampling. Buyer visibility built into channel design. Grievance data structured to flow back through the Tier 1 relationship without being filtered by it.

This is the next round of the WELL Cycle for buyers who have completed Tier 1 and are extending upstream. Listen. Diagnose. Improve. Educate. Repeat — one tier further out each time.

The buyers moving upstream are moving toward the risk.

The 2025 reporting cycle is showing which buyers are doing this work. The next reporting cycle will show which of them can evidence it.

→ Talk to us about evidencing grievance mechanism effectiveness across your value chain.

Human rights is a practice, not a project.

FAQs

Does CSDDD require Tier 2 grievance mechanisms?

CSDDD Article 9 requires effective grievance mechanisms across the chain of activities, with the strongest obligations at Tier 1 and a risk-based extension beyond. Tier 2 mechanisms are not mandated as a blanket requirement, but exposure at Tier 2 can still trigger CSDDD obligations where risk is identified.

What does the EU Forced Labour Regulation require at Tier 2?

Regulation (EU) 2024/3015 applies to any product placed on the EU market from 14 December 2027 onward, regardless of where in the value chain the forced labor risk sits. A buyer whose Tier 2 supplier is implicated can be required to respond with evidence within 30 working days in the preliminary phase. The regulation does not prescribe method, but the June 2026 implementation guidelines name worker interview transcripts, worker surveys conducted by trusted third parties, and grievance mechanism records as accepted evidence categories.

What makes Tier 2 grievance mechanisms harder to run than Tier 1?

Four structural factors: no direct commercial relationship between buyer and site, more linguistically fragmented and migrant-heavy workforces, channels typically operated by the Tier 1 supplier rather than the buyer, and lower worker awareness of the buyer's existence. Each of these compounds the effectiveness gap that Principle 31 asks buyers to close.

What is a "trusted third party" under the EU Forced Labour Regulation guidelines?

The Commission's June 2026 implementation guidelines state that workers should be interviewed by trusted third parties to protect confidentiality and safety. In practice this means an operator independent of the site and the buyer, running the channel with worker-facing accessibility work and confidentiality protection built in.

How do you assess grievance mechanism effectiveness at Tier 2?

Effectiveness under UNGP Principle 31 is evidenced from two sides at once: worker experience of the channel and the management systems supporting it. Labor Solutions' WELL Grievance Integrity Program measures both — the WELL Worker Survey captures whether workers know the channel exists, trust it, and see change when they use it, and the WELL Self-Diagnostic Tool captures whether the site has the systems to receive, process, and act on grievances. Neither alone is sufficient.

What is the difference between a grievance channel and grievance integrity?

A grievance channel is a mechanism a site has built. Grievance integrity is evidence that the mechanism works — that workers can reach it, trust it, and see resolution when they use it. Under CSDDD, LkSG, and the EU Forced Labour Regulation, existence is documented easily. Integrity has to be evidenced by workers.