LBMA Good Delivery is the phrase that appears on vault statements, in ETF prospectuses, on central bank reserve schedules, and in any institutional purchase agreement that settles loco London. Behind it sits a specification — weight, fineness, marking — and a List of refineries whose stamps are accepted as proof of that specification by counterparties who will never inspect the bar themselves. The standard is what makes an allocated gold position fungible at the wholesale level. The moment a bar leaves its perimeter — through a custody break, a refiner status change, or a missing record — that fungibility is lost, and the bar trades as recoverable metal with a refining discount, not as Good Delivery.
What LBMA Good Delivery Is, and Why Every Allocated Transaction Depends On It
The London Bullion Market Association issues two artifacts that govern wholesale gold: the Good Delivery Rules, which set out the physical specification, and the Good Delivery List, which names the refineries whose bars are accepted to that specification. The List for gold predates the LBMA itself — it was established by the Bank of England in 1750 and transferred to LBMA stewardship when the association was founded in 1987. What survived the transfer is the operational principle that has made wholesale gold tradeable for nearly three centuries: a bar bearing the stamp of an accredited refiner, with the required marks and within the specified physical envelope, is accepted by counterparties without independent assay.
That acceptance protocol is what gives an allocated gold position its fungibility at the wholesale layer. An allocated holding is a list of specific bars — refiner, serial number, gross weight, fineness — assigned to a specific buyer. The list trades, settles, and reconciles only because every line item answers to the same standard. Strip the standard out, and each bar becomes a bespoke metallurgical question: assay cost on every transfer, days added to settlement, counterparty discounts to absorb verification risk.
The same standard sits behind every wholesale acceptance layer an institutional buyer encounters. OTC loco London settlement clears against Good Delivery bars held in the LBMA-affiliated vault network. Central bank reserve disclosures reference Good Delivery holdings by refiner and serial. Physically-backed gold ETFs custody Good Delivery bars and publish bar lists down to the individual bar. COMEX deliverable contracts and the Shanghai Gold Exchange reference Good Delivery acceptability for physical settlement. Any wholesale transaction that needs to clear without a laboratory between the parties needs a standard both parties already trust, and at the institutional layer there is one.
Physical Specification of a Good Delivery Gold Bar
Four properties define a Good Delivery gold bar — weight, fineness, dimensions, and marks. Each is fixed by the Good Delivery Rules and applied uniformly across every accredited refiner.
| Property | Specification |
|---|---|
| Gross weight | 350 to 430 troy ounces |
| Minimum fineness | 995.0 parts per thousand fine gold |
| Length (top face) | 250 mm, tolerance ± 40 mm |
| Width (top face) | 70 mm, tolerance ± 15 mm |
| Height | 35 mm, tolerance ± 10 mm |
| Undercut on top face | 5° to 25° |
The weight range carries an operational consequence often missed by first-time institutional buyers. A “400 oz bar” is a colloquial reference to the format, not a fixed weight. Actual gross weight varies bar to bar within the 350–430 oz envelope, and each bar settles on its own fine gold content — gross weight multiplied by the fineness stamped on it. A list of ten Good Delivery bars is therefore not 4,000 fine ounces by definition; it is the sum of ten individually weighed and assayed fine contents, each priced at the same per-ounce rate but contributing a different quantity to the total.
Each bar must carry four mandatory marks:
- A serial number, unique within the casting refiner’s records.
- The refiner’s stamp — the assayer’s mark of a refinery on the Good Delivery List at the time of casting.
- Year of manufacture, required for any bar cast from 1988 onward; bars cast before this requirement entered force remain Good Delivery without it.
- Fineness, expressed in parts per thousand and reflecting the bar’s actual purity, which equals or exceeds the 995.0 minimum.
Documentation governs Good Delivery as strictly as content. A bar without all four marks falls outside the standard regardless of metallurgy, because at the wholesale layer the marks and the metal serve the same verification function.
Casting, surface, and proportions belong to the specification too. Production is by casting alone — minted forms fall outside the wholesale standard. Surfaces must be smooth and free of cavities, layering, and sharp edges, with proportions that allow stable stacking in a vault. Where casting defects appear, the bar drops off the standard until re-cast at the holder’s expense.
At the upper end of the weight envelope sits the institutional default — the 400 oz Large Bar, the format that anchors OTC settlement, central bank reserves, and physically-backed ETF custody.
Refiner Accreditation: How a Refinery Joins and Stays on the List
The Good Delivery stamp on a bar is not a refinery’s self-declaration. It is the visible end of a multi-year process under which the refiner satisfied technical, financial, and operational thresholds set by the LBMA, and continues to satisfy them through ongoing review. The thresholds are what make the stamp a credential. A bar bearing the mark of a current Active refiner has been produced under conditions a buyer would otherwise need to verify themselves — at a cost no wholesale market would absorb on a transaction-by-transaction basis.
Application, Technical Assay Test, and Production Capacity
A refiner applying for the gold List must demonstrate at least three years of operating history producing fine gold and a minimum annual production of 10 tonnes of refined gold. Below either threshold the application does not enter technical review. The capacity floor exists because Good Delivery is a wholesale standard — a refinery producing artisanal volumes cannot supply the wholesale layer the standard exists to serve.
Once admissibility is established, the technical phase begins:
- The applicant submits reference bars to the LBMA Executive, cast under normal production conditions.
- The bars are distributed by the LBMA to a panel of accredited referee laboratories, which assay them independently for gold content using fire assay against certified reference materials.
- Results are returned to the LBMA Executive and reviewed against the standard’s tolerances. Discrepancies among referees, or any deviation from the declared fineness beyond permitted limits, end the application.
- The applicant’s bar marks, casting practice, and quality-control documentation are reviewed in parallel.
The assay test answers a single operational question: when this refiner stamps a bar at 999.9, is the gold actually there. The infrastructure behind the answer — multiple independent labs, certified reference materials, panel review — is what makes the affirmative answer one a counterparty can settle against without re-testing.
Financial and Operational Standing Requirements
Technical proficiency is not, on its own, sufficient. A refiner on the List must also satisfy a tangible net worth threshold of £15 million, evidenced by audited financial statements covering the most recent three financial years. The LBMA Physical Committee reviews these statements as part of the application and reviews them again on a rolling basis after accreditation.
The financial threshold serves a function the technical test cannot. Refiner failure — operational, financial, or both — strands buyers whose bars, while metallurgically sound, suddenly carry the stamp of a non-existent Active counterparty. The capitalization requirement and ongoing audit lower the probability of that scenario at the population level. They do not eliminate it, but they push the refiner population toward businesses with substance, balance sheets, and audit relationships that can be tested before a problem reaches the bar layer.
Proactive Monitoring and the Responsible Sourcing Programme
Accreditation does not end at the application. Two continuous oversight regimes run against every Active refiner: Proactive Monitoring for technical performance, and the Responsible Sourcing Programme for supply-chain integrity.
Proactive Monitoring operates on a three-year cycle. Within each cycle, the LBMA Executive directs an independent collector to obtain a sample of the refiner’s current production — without prior selection by the refiner — and dispatch it to referee laboratories under the same testing protocol as the original accreditation. The mechanism is designed to detect fineness drift, marking inconsistency, or quality-control degradation that would not surface in a self-reported regime. Failure of a Proactive Monitoring sample triggers further testing and, if unresolved, suspension.
The Responsible Sourcing Programme, mandatory for all Good Delivery gold refiners since 2012, requires each refiner to undergo annual third-party audit by an LBMA-approved Service Provider. The audit assesses the refiner’s compliance with the LBMA Responsible Gold Guidance, which is aligned with the OECD Due Diligence Guidance for Responsible Supply Chains of Minerals from Conflict-Affected and High-Risk Areas. Scope covers supply-chain KYC on every gold input, screening against conflict-affected and high-risk source jurisdictions, anti-money-laundering controls, and management-system documentation. Audit reports are submitted to the LBMA Executive; non-compliance triggers remediation timelines and, where remediation fails, removal from the Active List.
A refiner that no longer satisfies the standard moves from Active to Former Refiner status. The operational consequence cuts in two directions. Bars cast while the refiner held Active status remain Good Delivery — the standard attaches to the bar at the moment of casting, not retrospectively. Bars cast after the refiner’s removal from the Active List do not. For an institutional buyer, this means the refiner’s status on the date a specific bar was cast — readable from the year stamp and the refiner’s accreditation history — determines whether the bar is wholesale-acceptable today, regardless of any change in the refiner’s standing since.
The Good Delivery List: Active Refiners and What Membership Signals
The LBMA publishes the Good Delivery List for gold as a single authoritative register, maintained by the LBMA Executive and updated whenever a refiner’s status changes. The List is organized in two tiers: Active Refiners, currently meeting all technical, financial, and supply-chain requirements; and Former Refiners, who held accreditation in the past but no longer do. Each entry records the refiner’s legal name, country of operation, the assay marks under which it has produced Good Delivery bars, and — for Former Refiners — the date of transition out of Active status.
Underlying the two-tier structure is a fact specific to bars: status attaches at casting and follows the bar, not the company. A refinery Active in 2014 produced Good Delivery bars in 2014, and those bars remain Good Delivery in vaults today, traded and reconciled against the same standard as any current bar. The Former Refiner entry functions as the audit trail — the record that lets a counterparty answer the only question that matters at the bar layer: was this refiner Active on the date this bar was cast.
Refiners move between tiers through several pathways. A refiner may be removed at its own request — typical when a refining business consolidates, exits gold, or restructures. It may be moved to Former status involuntarily, following failure of Proactive Monitoring sampling, breach of the Responsible Sourcing audit, or financial deterioration below the standing threshold. It may be suspended pending resolution of an open issue, with status published as Active-Suspended until the matter closes one way or the other. The List records each transition with effective date, and the historical record is preserved — not overwritten — so that bars cast at any past point can be evaluated against the refiner’s status at that time.
An institutional buyer transacts against Active List membership. A refiner currently on the Active List is producing bars that settle loco London without question, are accepted into LBMA-affiliated vault networks at face status, and qualify for inclusion in central bank reserve holdings, ETF backing, and exchange-deliverable inventory. The List, in this sense, is the institutional gold market’s whitelist — the named perimeter inside which the wholesale acceptance protocol operates.
Active Refiners: Selected Names
The Good Delivery List for gold currently contains roughly 70 Active Refiners across approximately 30 jurisdictions. The following are among the most institutionally recognized, selected for production scale, length of accreditation, and presence in central-bank-grade supply chains:
| Refiner | Country | Notable role |
|---|---|---|
| Heraeus Precious Metals | Germany | Among the largest gold refiners globally; supply anchor for Golden Ark Reserve |
| Argor-Heraeus SA | Switzerland | Joint operation within the Heraeus group; supply anchor for Golden Ark Reserve |
| Metalor Technologies SA | Switzerland | Long-accredited Swiss refiner; broad institutional bar distribution |
| MKS PAMP SA | Switzerland | Castel San Pietro refinery; widely held in ETF and central bank inventories |
| Valcambi SA | Switzerland | One of the largest gold refining capacities under a single roof |
| Rand Refinery | South Africa | Africa’s principal gold refinery; long-standing Active accreditation |
| Tanaka Kikinzoku Kogyo K.K. | Japan | Principal Japanese refiner accredited for Good Delivery gold |
Golden Ark Reserve sources Good Delivery bars through Heraeus Precious Metals and Argor-Heraeus SA, contracted under the Heraeus official supplier framework. Naming the refiner matters because identification of the bar runs through that mark — and the chain of integrity from refinery to buyer determines whether the bar’s wholesale acceptance survives to settlement.
What Good Delivery Means for Trading, Storage, and Settlement
Beyond the bar itself, the Good Delivery standard provides the reference point that institutional gold settlement and custody systems write into their own rules. Where the metal can move, who will accept it, and at what price all flow from that reference.
Acceptance Across Loco London, Central Banks, ETFs, and Exchanges
Wholesale gold trading clears largely under the loco London convention — book-entry transfer between LBMA member clearing accounts, with physical inventory held in the network of LBMA-affiliated vaults in and around London. The convention works because every entry on every clearing account references the same underlying object: a Good Delivery bar held by a member vault. Bars outside the standard have no clearing-account language to enter under; they trade, but not through loco London.
Central bank reserve holdings rest on the same standard. Central banks publish gold reserves in fine ounces and, where disclosure permits, by bar list — refiner, serial, weight, fineness. The bar list is institutional-grade only because it consists of Good Delivery bars; aggregation of non-standard bars across reserve holdings would require independent verification at the bar level, which no central bank reserve operation conducts at scale. Reserve relocations, swaps, and leases all reference Good Delivery as the implicit baseline.
Within physically-backed gold ETFs, the logic repeats. Fund prospectuses commit the custodian to hold Good Delivery bars in an LBMA-affiliated vault, and many funds publish the full bar list daily as part of the transparency model that justifies their structure to investors. A bar in an ETF inventory is, by construction, a Good Delivery bar with a clear chain back to the refinery — the same condition that determines its eligibility for any other institutional venue.
Across major exchanges, physical-delivery contracts reference the same standard. COMEX gold futures specify deliverable bars at 100 oz and 1 kg sizes from approved refiners — many of which are Active on the LBMA Good Delivery List — with the smaller-format specification operating in functional alignment with the LBMA framework. The Shanghai Gold Exchange operates its own approval system that draws heavily on LBMA-accredited refiners. Where a bar is Good Delivery, its acceptability across these venues is mechanical; where it is not, each venue applies its own bespoke verification, generally at the holder’s cost.
The cumulative effect is liquidity. A Good Delivery bar can move from a vault in Switzerland to a clearing account in London to ETF custody to a central bank reserve disclosure without ever leaving the standard’s perimeter. A bar outside the standard requires bilateral verification at every transition, and the cost of that verification is what the bar’s holder absorbs in any disposal.
A purchase that begins with a Good Delivery bar and ends with one preserves all of the above. Institutional gold purchase mechanics — refiner-origin sourcing, allocated documentation, vault placement under chain of integrity — exist to ensure the bar a buyer settles on is the bar that arrives in their vault account, with status intact.
When a Chain-of-Custody Break Invalidates Good Delivery Status
A bar’s Good Delivery status survives only as long as its chain of custody can be traced through entities that the standard’s acceptance protocol recognizes. Several classes of event break that chain, and the operational consequences fall on the bar’s holder at the moment of next disposal.
Removal from the LBMA-affiliated vault network. The acceptance protocol assumes the bar moved between vaults that operate under LBMA-recognized custody and security standards. A bar transferred into a non-network vault — a private safe, a commercial vault outside the recognized perimeter, or storage with a custodian whose security and inventory practices have not been audited against the relevant standards — has, in the language of the market, “lost its chain of integrity.” Returning it to the network requires re-verification, and depending on the depth of the gap, re-assay.
Custody by a non-accredited party. Periods of custody by an entity not party to the network — including individual private holding outside professional custody arrangements — produce the same effect. The bar may be metallurgically unchanged; the audit trail that the wholesale layer settles against is not.
Refiner status change after casting. A bar cast while the refiner was Active retains Good Delivery status indefinitely. But where a refiner has moved to Former status under unfavorable circumstances — failed Responsible Sourcing audit, financial collapse, regulatory action — secondary-market acceptance of bars from that refiner can tighten even where the standard formally permits them. The bar remains Good Delivery on paper; the discount that appears at resale reflects the market’s risk assessment of the refiner’s historical practice during the period the bar was cast.
Seal and packaging breaks outside controlled handover. Bars move within the network in sealed forms — wooden boxes with serial-marked seals, sealed pallets, tamper-evident packaging keyed to the chain of integrity. A break in those seals outside a controlled handover at an accredited vault triggers re-weighing and, in many cases, re-assay before the bar re-enters the network at full status.
Missing or incomplete documentation. Allocation records, weight lists, transfer documentation, and vault account statements form the paper trail that mirrors the physical chain. A bar with intact physical condition but a documentation gap — missing transfer record, broken sequence of vault confirmations — is treated, at the wholesale layer, as having an unverified period that must be closed before full acceptance.
The operational consequence in every case is the same. The bar can still be sold; the sale clears at a price that reflects the cost of restoring the standard, plus a discount for residual uncertainty. For a 400 oz bar at institutional volumes, that gap is measurable in five-figure currency amounts per bar. For an institutional position built on bars whose chain of integrity has been broken, the cumulative cost can exceed the carrying cost of full-standard custody for years. Preventing quiet degradation between acquisition and disposal takes two things working together: counterparty and supply-chain compliance gating at the point of purchase, and continuous custody inside the recognized vault network thereafter.
Where Good Delivery Gold Bars Fit in Golden Ark Reserve’s Supply
Golden Ark Reserve operates as a trading counterparty whose gold supply runs through Heraeus Precious Metals and Argor-Heraeus SA — both Active refiners on the LBMA Good Delivery List, contracted under the Heraeus official supplier framework. Bars sourced this way leave the refinery with Good Delivery status established at casting and documented in production records. From there, the path between refinery and buyer’s vault account is structured to keep that status intact end to end.
Brink’s serves as custodian under the contracted arrangement. The relationship runs through Brink’s: bars are held on the buyer’s behalf, inter-vault movements occur under sealed handover, inventory is reconciled against bar-level allocation records, and — where loco London settlement or ETF-grade custody is the intended use — placement in LBMA-affiliated vaults forms part of the structure. Golden Ark Reserve sources the bars and structures the contract; Brink’s holds them.
At settlement, the buyer receives an evidence set built to the same standard. The package includes the purchase agreement specifying the bars by refiner, serial number, gross weight, and fineness; the refinery’s certificate or weight list confirming production specification; the AML and KYC record satisfying counterparty gating; payment confirmation; and the allocation record entered against the buyer’s vault account with Brink’s. Each document references the bars by the same identifiers, so that the position can be reconciled across documentation, vault inventory, and any subsequent disposal without ambiguity at the bar layer.
For the buyer, the delivery is a position auditable end to end — Good Delivery at origin, allocated under documentation that preserves the standard, held in a network the wholesale market settles against without question.
Available formats and transaction parameters are set out at LBMA Good Delivery gold bars at Golden Ark Reserve. Identifier registries, audit records, and the relationships that anchor the supply chain are documented in the Golden Ark Reserve company profile.