Gold Refinery Transparency: Voluntary Disclosure vs Guinea’s Mandate

Most gold leaving Africa’s mines has never carried a public label naming the refinery that turns it into bullion. Of the commercial relationships SWISSAID mapped across the continent, 79% run through refiners in Switzerland, South Africa or India. If you assume you can trace where a listed miner’s gold ends up, gold refinery transparency is thinner than it looks.

That changed twice in the past week. On 5 October 2026, the World Gold Council (WGC) released an updated refinery disclosure template. A day later, Guinea’s 90-day transition to mandatory domestic refining expired, and the first bars from the Nimba Gold Refinery were reported exported on 9 October.

These are two very different routes to the same goal. One asks companies to volunteer the information. The other makes the refinery a matter of law.

After this, you will be able to judge which kind of disclosure tells you more about supply chain risk, and what to ask a gold producer before taking its sourcing story on trust.

Why have gold producers kept their refiners secret?

If secrecy were purely commercial, you would expect miners to explain the harm clearly. SWISSAID’s 2023 investigation suggests otherwise.

The case for keeping names private

The justifications producers gave were varied, and each had a ready counterpoint:

• Habit: B2Gold said publication was not its normal practice, which describes the status quo rather than defending it.
• Limited relevance: Barrick called the information of little significance, an odd position given the buyer interest in provenance.
• Contractual consent: Newmont said it needed refiners’ prior consent; Perseus Mining said it asked but did not receive it. That points to refiners, not miners, setting the terms of silence.
• Competition: Firms cited confidentiality over refining charges, credit terms and hedging relationships, though a refinery’s name does not reveal its price.
• Security: Some argued public association with a refinery makes theft and fraud easier, a concern critics regard as overstated.

Some producers do share refiner details privately with banks, auditors or regulators. The information exists; it simply stops short of the public.

SWISSAID’s findings on refiner secrecy show that producers cited competition and security without consistently demonstrating what damage naming a refinery would cause, which weakens the case for keeping these relationships hidden.

The evidence gap According to SWISSAID, companies invoked competition and security but did not consistently demonstrate what damage naming a refinery would actually cause.

The case for naming them

NGOs and many investors argue identity can be published without exposing pricing. They also highlight a less comfortable motive for silence: if a named refinery later faces scrutiny over high-risk or illicit gold, its upstream suppliers get pulled into the story, even when their own production is clean.

Industry bodies push back that rigid rules could force contract renegotiation and limit flexibility to switch refineries. That is a fair operational concern, but it is not the same as showing harm.

When a miner cannot articulate why naming its refinery would hurt it, treat the silence as an information gap worth raising on the next investor call, not as a neutral default.

What the WGC template changes, and what it leaves untouched

That gap is exactly what the WGC’s new template targets. To judge it, you first need the basic mechanics.

Gold refining basics for non-specialists

Doré is a semi-pure alloy of gold and silver produced at the mine site. A refiner purifies doré into investment-grade bars. Accreditation, such as LBMA Good Delivery status from the London Bullion Market Association, certifies that a refiner’s bars meet the standards major bullion markets accept.

For example, doré from B2Gold’s Fekola mine in Mali travels to Rand Refinery in South Africa before becoming tradeable bars. The refiner is the choke point where provenance is checked, which is why its identity matters.

Because doré bars leave the mine site as an unfinished alloy of gold and silver, the refiner that receives them holds the first real opportunity to test origin and purity before the metal enters the bullion market.

The LBMA Responsible Gold Guidance and due diligence frameworks aligned with the Organisation for Economic Co-operation and Development (OECD) place the burden of scrutinising suppliers on refiners. They do not universally require miners to name their refinery counterparties publicly.

The WGC’s template fills part of that hole. It offers a standardised mine-level format showing where each operation’s doré is refined, building on a September 2023 pledge by members to publish refiner names and locations at least annually. That pledge covered 33 members with operating mines, producing roughly 1,300 metric tons of gold a year.

Some miners were already there. Newmont names refining partners in its 2024 and 2025 sustainability reports, B2Gold lists Rand Refinery for Fekola and Otjikoto in Namibia, and Endeavour Mining disclosed before the 2023 pledge.

The limits are sharp. The template is voluntary, carries no sanctions, and no named adopters could be found in the accessible guidance note.

ESG-focused investors and Principles for Responsible Investment signatories increasingly argue refiner transparency should be standard for large listed producers, preferring listing rules or lender covenants to voluntary reporting.

For you, the template makes like-for-like comparison easier, but only willing companies will appear. Absence from the disclosure list is itself the data point to watch.

Guinea and its neighbours: when the state mandates the refinery

Where voluntary tools rely on goodwill, several West African governments have simply legislated the answer. Guinea moved fastest.

Guinea’s timeline

1. June 2026: President Mamadi Doumbouya announced an end to raw gold exports, with all gold to be refined locally.
2. 8 July 2026: A decree required domestic refining before export, with a 90-day transition.
3. 6 October 2026: The transition expired. Exports now require refining by an authorised Guinean refinery to at least 95.5% purity, plus export certification.
4. 9 October 2026: Benin Web TV reported the first Nimba bars exported.

The Conakry refinery has an estimated capacity of 2,000-4,000 kg per day, according to Koaci. Refining or assaying reports must now go to the gold and gems office (OGE), the central bank (BCRG), Customs and the national geology laboratory. That multi-agency chain builds traceability by design rather than by disclosure.

Gaps remain. Enforcement details, the facilities used and any exemptions are unclear, and PDI Gold is considering on-site refining at Kiniero and Bankan to meet the purity threshold while other producers have said little publicly.

A regional pattern

Guinea is the leading edge, not an outlier.

Raffinor-BF cost more than 11 billion CFA francs (about $19M), and the BBC notes its capacity exceeds Burkina Faso’s current production. Set against the 79% concentration in Swiss, South African and Indian refiners, these projects aim to pull processing back onto the continent.

Mali’s refinery project sits alongside tighter presidential control over gold mining, a governance shift that makes the credibility of any state-linked refinery a central question for investors.

A mandate turns gold’s destination from a company choice into a legal fact. It also moves your question from “which refinery?” to “how credible is this one?”, the lens to apply to every new national refinery.

The risks behind local refining mandates

The political appeal is easy to grasp: keep mining profits at home, capture more revenue, and know exactly where the metal goes. The caveats arrive once you look at how such systems have worked elsewhere.

Guinea’s mandate fits a wider push toward state value capture, in which governments use export rules and domestic processing requirements to keep more of gold’s revenue at home.

Analysts flag five:

• Market access: Many new national refineries lack LBMA Good Delivery accreditation early on, risking discounts or limited acceptance in major bullion markets.
• Governance: Centralisation raises state leverage but also corruption risk, with revenue potentially channelled to narrow elites.
• Smuggling: Higher costs or delays can push trade toward smuggling and mis-invoicing, especially where borders are porous and artisanal sectors large, as in Guinea, Ghana and Tanzania.
• Contract disruption: Producers may need to renegotiate offtake agreements with foreign refiners and rework logistics.
• Technical capacity: Weak sampling, assaying or environmental compliance can make buyers doubt the traceability chain itself.

Precedents show the trade-off in practice.

Rand Refinery is the counter-example that matters: local refining can deliver both traceability and market access when it is well governed and accredited.

The real condition These caveats temper expectations rather than argue against local refining. They point to strong governance, technical capacity and alignment with LBMA and OECD standards as the conditions for success.

Before assuming a mandate lowers supply chain risk, apply three tests to any new national refinery: its accreditation status, the credibility of its sampling and assaying, and its governance structure.

Reading African gold supply chains with sharper questions

Voluntary disclosure and state mandates are converging on the same goal, yet neither guarantees traceability alone. A named refinery means little if it is poorly governed, and a mandated one means little if buyers will not trust its bars.

Provenance and traceability are becoming priced characteristics of gold, which is why a refinery’s identity and credibility increasingly influence how buyers value the bars it produces.

Three signals deserve your attention:

• Which producers adopt the WGC template and publish refiner names annually
• Whether Nimba, Raffinor-BF and later national refineries secure LBMA accreditation
• How Guinea’s enforcement and exemptions work in practice

Together, these will show whether African gold’s paper trail is genuinely lengthening. If you track them, you can price supply chain risk on evidence rather than assumption.

These statements are speculative and subject to change based on market developments and company performance.

This article is for informational purposes only and should not be considered financial advice. Investors should conduct their own research and consult with financial professionals before making investment decisions.