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MSE Technical Note · Custody

Continuous Custody: What No Document Proves Between the Plant Gate and the Buyer’s Yard

A certificate of origin proves where the goods were made, a bill of lading what was shipped, a delivery receipt what arrived. Nothing proves that they stayed the same goods in between, or who held them when. A note on the document that would, the protocol behind it, and three questions to the market.

Technical note · September 2026 · 6 min read · Metal Supply Experts GmbH

Version 1 · September 2026. The document described here is proposed, not yet issued. Regulatory references are current at publication and are to be re-read on the day they are used.

Contents

  1. The gap
  2. Why the gap now has a price
  3. The document
  4. How a transfer is fixed
  5. What each party holds
  6. MSE’s part
  7. Three questions

Figure one on the MSE homepage marks MSE over the whole line of a transaction - origination, contract, bank, insurer, certifier, terminal, freight, customs. This note is about what that line cannot prove today, and what MSE organises on it under a mandate.

01The gap

A certificate of origin proves where the goods were made. A bill of lading proves what was shipped by sea. A delivery receipt proves what arrived. Between them - haulage, rail, border, port, terminal - possession changes hands six to ten times, and no document attests that the goods stayed the same goods, or who held them when. Every station issues its own paper: a consignment note, a port receipt, a warehouse entry. None joins to the next.

The line, and what it lacks Figure · one

Scroll figure →

The line of a transaction, and what it lacks Seven stations from the plant gate to the buyer’s yard. Above the line, in brass, the three papers that exist today - a certificate of origin at the plant gate, a bill of lading over the sea leg, a delivery receipt at the buyer’s yard. Beneath the line, in ink, one continuous record with every transfer attested by both hands. Certificate of origin Bill of lading Delivery receipt Plant gate Rail head Border Loading port Vessel Terminal Buyer’s yard Continuous custody - one record, every transfer attested by both hands

Brass - the papers that exist today, each covering one station or one leg. Ink - what this note proposes.

02Why the gap now has a price

The gap used to be tolerated. Three regimes now put it on the importer’s desk and on the bank’s.

Under Regulation (EU) 2023/956 (CBAM), definitive from 1 January 2026, embedded emissions are calculated for the installation where the goods were produced (Annex IV). A consignment must therefore be attributable to that installation - and a terminal that mixes lots breaks the attribution unless the mixing is accounted for.

Under Directive (EU) 2018/2001, Article 30, a biofuel’s sustainability claim passes along the chain only through a mass-balance system. A transfer outside it ends the claim.

Under Regulation (EU) 2023/1542, Chapter VII, supply-chain due-diligence obligations for battery raw materials apply from 18 August 2027, the date set by Regulation (EU) 2025/1561.

Each asks the same question in a different form: can these goods be traced to the place and the hands they came from, without interruption? Today the answer is a chain of assurances.

03The document

A Certificate of Continuous Custody states that between a witnessed first fixation and final acceptance, possession of a defined custody unit was held without interruption by named legal persons - every transfer attested by both the releasing and the receiving custodian, seals continuous, mass reconciled within a stated tolerance, every event time-stamped by an authority outside the chain.

It certifies possession, not title, and attested continuity, not physical truth - the standing of a bill of lading, no more and no less. Anyone holding the event record can verify it without trusting the issuer.

04How a transfer is fixed

The unit. Its identifier derives from the goods - cast or heat numbers, assay, certified mass - and from the seals on them. A code is only a pointer.

First fixation. Witnessed by an independent party - a surveyor, or the customs export declaration. Everything downstream inherits the trust of this event.

The transfer. Two-sided. One custodian releases, the next accepts, each signing what it observes - seals, mass, place, time - from a registered device, in the same place, within the same window. A discrepancy is not silence. It becomes an exception charged to an interval.

The interval. The accepting custodian’s liability until its own release is accepted. Tracking data may be attached. It is never required: the chain is made of handovers, not of positions.

The record. Append-only, each event linked to the last, time-stamped outside the chain. Each link carries its class of evidence - two-sided attestation, one side plus the counterpart’s document, document and seal, independent witness - so the reader sees how strong the link is, not merely that it exists.

What counts as a break

  • An interval without a custodian.
  • A transfer with one signature that is not matched within its window.
  • A seal that does not match, without a witnessed re-sealing.
  • A mass outside tolerance is not a break but an exception charged to the interval.
  • Goods that moved faster than physically possible between two events stop the chain until explained.

05What each party holds

Producer. Continuity of origin that a compliance desk can accept rather than discount.

Importer. Evidence for customs and for carbon attribution at the installation.

Bank. A collateral position in transit - between the plant gate and the first warehouse where a collateral manager begins.

Terminal. An inbound chain that arrives with a record instead of a phone call.

Insurer. Shortage and damage located to an interval and to a custodian.

06MSE’s part

MSE sells no software. Under a mandate it organises the chain - the custody clause in each carrier’s and terminal’s contract, enrolment of the custodians, the witness at first fixation, the tolerances, the record and the certificate. The software is a tool inside the mandate, its cost agreed with the principal in advance.

07Three questions

This note is put to producers, importers, banks, terminals and insurers with three questions.

  1. For goods you handle or finance today, what evidence of continuity do you accept - and where does it fail?
  2. Would a certificate as described change a decision - to accept, to finance, to insure - and on what condition?
  3. Which shipment or corridor would you put first?

Answers and cases are read at enquiries@metalsupplyexperts.com.

Metal Supply Experts GmbH acts for clients in metals, building materials, energy commodities and critical minerals - in the client’s name or its own as commission agent (Swiss OR Art. 32 ff., 425-438), as agreed in each mandate. This note proposes a document and the protocol behind it. It is published for discussion and is not investment, legal or tax advice. Enquiries: enquiries@metalsupplyexperts.com Cite as: Metal Supply Experts GmbH, “Continuous Custody: What No Document Proves Between the Plant Gate and the Buyer’s Yard”, version 1, September 2026, https://metalsupplyexperts.com/continuous-custody.html
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Related at MSE

Tool
Bankability Framework
Gates, collateral and six credit pillars. Gate two asks for control over the goods - this note is about the evidence between the plant gate and the first warehouse.
Capability
Carbon, Compliance & Traceability
Where the chain of custody is designed into the transaction, with the certification and the carbon file it carries.
Layer
Terminal Operations
Where the first warehouse receipt is issued and where a collateral manager begins.
Capability
Trade Documentation & Customs
Where origin and CBAM data are filed, and where the papers of section 01 are made.

Have a cargo whose custody has to be proven from the plant gate to the buyer’s yard?

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