Letters of Credit in the Copper Trade: How L/C Payment Works for Buyers & Sellers
A letter of credit is a bank's written promise to pay the seller once the seller hands over shipping documents that match the credit's terms exactly. In the copper trade it exists to solve one problem: the seller does not want to release five containers of metal to a buyer they have never met, and the buyer does not want to wire funds for metal they have not seen loaded. The L/C puts a bank between the two, and pays against documents — not against the cargo, and not against goodwill.
Why the L/C became the export standard
Copper is high-value and easy to move. A single container carries a serious sum of metal, and a five-container minimum export lot puts a large amount of value on the water for four to six weeks. Neither party can reasonably ask the other to carry that exposure alone.
An irrevocable documentary credit resolves it. Once issued, it cannot be amended or cancelled without the agreement of every party, so the seller can commit yard space, buy the material, and book the vessel knowing that a bank — not just a counterparty — stands behind payment. The buyer, meanwhile, does not part with funds until documents prove the goods were shipped, on time, in the described grade, from the described port.
Most credits in metals are issued subject to the ICC's Uniform Customs and Practice for Documentary Credits (UCP 600), which has governed documentary credits worldwide since 2007. That matters practically: it means a Turkish buyer's bank, a Florida exporter's bank, and a Singapore confirming bank all read the same rulebook.
How the money actually moves
The sequence is always the same, whatever the market:
- Contract first. Grade, ISRI code, tonnage, tolerance, Incoterm, shipment window, and pricing formula are agreed in writing before any bank is involved.
- Buyer applies. The buyer's bank (the issuing bank) opens the credit and transmits it to the seller's bank.
- Seller checks the draft. This is the step buyers underestimate. A credit with terms the seller cannot physically satisfy is worthless — see below.
- Goods ship. The seller loads, gets inspection done, and collects the document set.
- Documents presented. The seller's bank forwards them to the issuing bank, which examines them. Under UCP 600 a bank has up to five banking days after presentation to decide whether the documents comply.
- Payment and release. If documents comply, the bank pays (or commits to pay at maturity) and releases the bill of lading to the buyer, who uses it to collect the containers.
Sight vs usance, in plain English
A sight L/C pays the seller as soon as compliant documents are accepted. A usance or deferred-payment L/C pays a set number of days later — 30, 60, or 90 days from the bill of lading date are the usual tenors. The buyer gets the cargo now and pays later; the financing cost sits with the seller unless it is priced in or the credit is discounted.
Two further terms matter. A confirmed credit adds a second bank's independent guarantee, usually one in the seller's country — worth requesting when the issuing bank is small or in a jurisdiction with transfer risk. And a credit allowing partial shipments and transhipment is far easier to perform on a multi-container copper lot than one that forbids both.
| Term | What to look for |
|---|---|
| Type | Irrevocable, subject to UCP 600. Confirmed if the issuing bank is unfamiliar |
| Tenor | At sight, or usance 30/60/90 days from B/L date — agreed in the contract, not sprung later |
| Quantity tolerance | Allow ±5% or ±10%; scrap and cathode never load to an exact tonne |
| Partial shipment / transhipment | Allowed — a five-container lot rarely moves on one vessel with no relay |
| Latest shipment date | Realistic against booking lead time out of Port Everglades |
| Presentation period | 21 days after B/L date is the UCP default; shorter windows create needless risk |
| Goods description | Short and identical to the invoice — ISRI grade code, not a paragraph of specification |
| Charges | State clearly which side pays issuing, advising, confirming and amendment fees |
The documents that must match
Payment turns entirely on paperwork. A typical copper export presentation includes a signed commercial invoice; a full set of clean on-board ocean bills of lading; a packing and weight list; a certificate of origin; an independent pre-shipment inspection or analysis certificate naming the grade; and, on CIF terms, an insurance certificate. Some destinations add a certificate of non-radioactivity or a specific import licence reference.
Every one of those documents must agree with the credit and with each other. Banks do not inspect metal — they compare text. If the credit says "Mill Berry Copper Scrap ISRI Barley" and the invoice says "No.1 Copper Wire", that is a discrepancy, even though both describe the same material.
Confirm the details with your bank and broker
Documentary requirements, import licensing and duty treatment vary by destination and change without much notice. Treat this as orientation, not legal or banking advice — have the draft credit reviewed by your trade-finance officer and confirm current import documentation and duties with your customs broker before the credit is issued. Amending a credit after issuance costs money and time.
The discrepancies that hold up payment
Industry experience is consistent: a large share of first presentations are rejected on a technicality, not on substance. The recurring ones in metals are worth memorising.
- Late shipment or late presentation. The vessel sailed after the latest shipment date, or documents arrived outside the presentation period. Neither is fixable after the fact.
- Weight outside tolerance. The credit allowed no variance and the containers loaded slightly over or under.
- Inconsistent goods description. Grade wording differs between credit, invoice, and inspection certificate.
- Bill of lading defects. Not marked on board, not a full set, wrong consignee or notify party, or claused as damaged.
- Missing or unsigned certificate. An inspection or origin certificate issued by a party the credit did not name.
- Terms nobody can perform. A credit demanding a document only the buyer can issue, or an inspection at a port the cargo does not call at, hands control back to the buyer and defeats the purpose.
The fix is unglamorous and effective: read the draft credit line by line the day it arrives, and ask for amendments before shipping rather than arguing after. An hour of checking prevents weeks of delay.
Why we ask for an L/C on new relationships
Atlas Copper International has shipped to 47 countries since 1962, and the payment structure is part of how we qualify counterparties. A buyer who can open an irrevocable credit through a real bank has been through that bank's own due diligence, has the funds, and intends to perform. A buyer who cannot — or who counters with instruments no metals exporter uses — has told you something useful before either side spends money.
It works the same way in reverse for the buyer. A supplier willing to ship against a documentary credit, accept independent inspection, and put the ISRI grade on the contract is a supplier with material and a reputation to protect. Pricing on our side stays LME-linked with a transparent grade-based margin and volume tiers, whichever payment route is agreed — the credit governs how you pay, not what you pay.
Planning a container lot?
Send your grade, tonnage, discharge port, and preferred payment structure — we will come back with draft L/C terms we can actually perform against.
Get an Export QuoteFrequently asked questions
What is a letter of credit in the copper trade?
An irrevocable documentary credit issued by the buyer's bank promising to pay the seller once the seller presents shipping documents that comply exactly with the credit's terms. The bank's undertaking replaces the buyer's promise, so neither side has to advance value on trust.
What is the difference between a sight L/C and a usance L/C?
A sight L/C pays the seller once compliant documents are accepted. A usance (deferred payment) L/C pays a fixed number of days later — commonly 30, 60, or 90 days from the bill of lading date — which gives the buyer credit but shifts financing cost onto the seller.
Which documents does a copper export L/C usually require?
Typically a signed commercial invoice, full set of ocean bills of lading, packing and weight list, certificate of origin, an independent inspection or analysis certificate naming the ISRI grade, and an insurance certificate on CIF terms.
Does Atlas Copper International require a letter of credit?
For new export relationships, an irrevocable L/C from a reputable bank — or an agreed deposit plus balance against shipping documents — is the standard. Established accounts can discuss other structures. Pricing stays LME-linked with a transparent grade-based margin either way.