L/C, T/T, D/P and D/A are all used to settle international trade, but they do not provide the same payment assurance. The decisive difference is not simply that funds pass through a bank; it is the bank’s role, the point at which the buyer receives documents, the event that triggers payment, and the party carrying buyer-credit risk. A contract that merely says “payment through bank” can still leave an exporter unpaid after shipment, an importer exposed after prepayment, or an L/C presentation rejected for discrepancies. This guide explains the operating mechanism of each method, compares risk, cost and documentary control, sets out the process flow, and identifies the contract data that must be fixed before use. The objective is to help buyers and sellers select a structure suited to the transaction value, relationship history, country risk, financing needs and ability to prepare compliant documents.

Prepared by TGIMEX · Updated: 20 July 2026 · Scope: B2B cross-border goods payments

QUICK FACTS

L/C is an independent bank undertaking

The issuing bank honours a complying presentation under the credit; banks deal with documents rather than verifying the actual quality of goods.

T/T describes the funds transfer rail

Risk depends on timing: advance T/T favours the seller, while post-shipment or open-account T/T favours the buyer.

D/P releases documents against payment

A collecting bank releases documents as instructed after payment; it does not automatically pay if the buyer refuses.

D/A releases documents against acceptance

The buyer receives documents after accepting a time draft and is expected to pay at maturity; seller credit risk is higher than under D/P.

There is no universal best method

Selection depends on relationship, shipment value, jurisdiction, goods, document control, cash flow, financing and bank costs.

Illustration for L/C, T/T, D/P and D/A: Key Differences in International Payments — Illustration of the logistics topic, document or operation discussed in the article.

SCOPE OF APPLICATION

This article applies to international B2B contracts for goods where payment interacts with invoices, transport documents, insurance documents, certificates of origin and bills of exchange. It supports contract negotiation, cash-flow planning, document coordination and payment-risk assessment.

It should not be applied mechanically to services, retail e-commerce, restricted transactions, or payments subject to special foreign-exchange or sanctions rules. Final terms depend on the sale contract, serving banks, governing law and mandatory regulations in the relevant jurisdictions.

KEY TERMS

Term	Operational meaning	Bank role
L/C – Letter of Credit / Documentary Credit	A documentary credit. Under UCP 600, a credit is irrevocable even if it does not state so, and the issuing bank undertakes to honour a complying presentation.	The credit must state availability by sight payment, deferred payment, acceptance or negotiation; a confirming bank adds its own independent undertaking where confirmation is added.
T/T – Telegraphic Transfer	Electronic bank transfer used for advance, deposit, milestone, copy-document or post-shipment payment.	The bank executes the transfer and compliance controls; it normally does not examine trade documents as a condition of payment.
D/P – Documents against Payment	Documentary collection under which documents are released against payment, commonly D/P at sight.	Banks transmit and present documents under collection instructions without undertaking buyer payment.
D/A – Documents against Acceptance	Documentary collection under which documents are released after the buyer accepts a time draft.	Banks obtain acceptance and release documents; buyer acceptance is not automatically a bank guarantee.
Applicant / Beneficiary	The party requesting the L/C—usually the buyer—and the party in whose favour it is issued—usually the seller.	Core parties in a documentary credit.
Principal / Drawee	The collection principal—usually the seller—and the party to whom documents/draft are presented—usually the buyer.	Core parties in D/P and D/A collections.
Complying presentation	A presentation complying with the credit, UCP 600 and applicable international standard banking practice.	The condition that activates the bank undertaking under an L/C.

SUBSTANCE AND OPERATING MECHANISM

1. L/C: a bank undertaking based on documents

The issuing bank’s obligation is separate from the sale contract. Shipment alone does not entitle the seller to payment; the seller must present documents that comply with the credit. Conversely, a buyer generally cannot require refusal of a complying presentation merely because it disputes the goods. L/Cs reduce buyer-credit risk but create documentary discrepancy risk.

A credit must state whether it is available by sight payment, deferred payment, acceptance or negotiation. Under UCP 600, negotiation is not mere document examination; it is the nominated bank’s purchase of drafts and/or documents by advancing or agreeing to advance funds. A confirmed credit adds the confirming bank’s undertaking but also introduces additional cost and credit conditions. L/C therefore does not automatically mean immediate cash or absolute safety.

2. T/T: a payment rail, not a package of security

T/T shows that funds are transferred through banks, but it does not determine whether payment is in advance, after shipment, or on another milestone. A 100% advance T/T protects the seller but shifts delivery risk to the buyer; a post-shipment T/T or open-account structure does the reverse. A 30% deposit and 70% against a copy B/L is a contractual structure only: a document copy or SWIFT message does not verify contractual performance and does not replace confirmation that cleared, available funds have actually been credited to the beneficiary. SWIFT is a financial messaging network; banks and other financial institutions execute the actual transfer and account credit.

3. D/P: documentary control without a bank payment undertaking

The seller entrusts documents and collection instructions to the remitting bank. The collecting or presenting bank approaches the buyer and releases documents only against payment as instructed. This can create leverage where originals are needed to obtain the goods, but the buyer may still refuse. The seller may then face storage, demurrage, resale, return or abandonment decisions.

4. D/A: documents are released before cash maturity

Under D/A, the buyer accepts a time draft and receives the documents. The seller exchanges control of the goods for a receivable due in the future. Non-payment at maturity remains buyer-credit risk unless separate security—such as an aval, guarantee or credit insurance—is arranged.

Core distinction: L/C creates a bank obligation against compliant documents; D/P and D/A are collection mechanisms without an automatic bank payment undertaking; T/T is a transfer instruction whose risk allocation depends on the contractual payment milestone.

COMPARISON MATRIX

Criterion	L/C	T/T	D/P	D/A
Nature	Independent documentary undertaking of issuing bank.	Funds transfer instructed by payer.	Collection: documents against payment.	Collection: documents against acceptance of a time draft.
Payment trigger	Complying presentation and the availability structure stated in the credit.	Contractual milestone; may be before or after shipment.	Buyer pays before documents are released.	Buyer accepts the draft before documents are released and pays at maturity.
Bank undertaking	Issuing bank undertaking; additional undertaking if confirmed.	Normally no undertaking for the commercial obligation.	No undertaking to pay if buyer refuses.	No undertaking to pay unless a separate guarantee/aval exists.
Document examination	Banks examine compliance under the credit and applicable rules.	Not inherently documentary unless a separate service is arranged.	Banks act on collection instructions, not L/C-style compliance examination.	Similar to D/P; focus is obtaining acceptance as instructed.
Main seller risk	Discrepancies; issuing-bank/country risk if unconfirmed; document timing.	High for post-payment, lower for advance payment.	Buyer refuses payment and goods require alternative disposal.	Buyer receives goods and fails to pay at maturity.
Main buyer risk	A complying document set may not prove actual goods quality.	High for advance, lower for post-payment.	Payment is made before practical inspection of goods.	Future payment obligation and maturity cash-flow risk.
Cost/complexity	Usually highest: issuance, advising, amendment, confirmation, examination and settlement fees.	Usually simpler: transfer, correspondent, FX and compliance costs.	Below L/C in many cases, with collection and courier charges.	Collection costs plus draft, maturity tracking and possible discounting.
Typical fit	New relationship, higher values, material country/credit risk, financing need.	Trusted relationship or balanced deposit/balance structure.	Established relationship where seller still wants document control.	Trusted buyer to whom seller is willing to extend trade credit.

Avoid rigid rankings: Advance T/T may be safer for a seller than an L/C, while post-payment T/T may be riskier than D/A. Assess the actual structure, not the abbreviation.

DOCUMENTS AND DATA TO CHECK

Document/data	Prepared or issued by	Use	Fields to align
International sale contract	Buyer and seller	Fix method, percentages, dates, banks and default consequences.	Contract number, currency, Incoterms, shipment and payment milestones, governing law.
Proforma / commercial invoice	Seller	L/C application, remittance, collection and accounting.	Description, amount, currency, contract and delivery term.
L/C application and issued credit	Buyer / issuing bank	Establish the documentary undertaking.	Applicant, beneficiary, amount, expiry, latest shipment, presentation period, documents and availability.
Collection instruction	Seller / remitting bank	Direct the D/P or D/A collection.	Release condition, amount, draft, charges, interest, protest and non-payment handling.
Bill of exchange / draft	Seller where required	D/A, some D/P structures or acceptance credits.	Drawee, tenor, maturity, amount, place of payment and acceptance.
B/L, AWB or transport document	Carrier / forwarder in its issuing capacity	Control delivery and support presentation.	Shipper, consignee, notify, originals, on-board date, route and freight status.
Packing list, C/O, insurance and certificates	Relevant authorised issuer	Complete L/C or collection document set.	Description, quantity, dates, invoice references and contract/L/C requirements.
Bank coordinates and payment instruction	Parties and servicing banks	T/T, L/C reimbursement or collection settlement.	Beneficiary, account, SWIFT/BIC, correspondent, and OUR/SHA/BEN charges if applicable.
Sanctions, AML/KYC and FX data	Banks and businesses	Pre-issuance, transfer and document handling.	Countries, vessel, ports, parties, goods, purpose and source documents.

PROCESS / HOW TO APPLY

L/C flow

Negotiate terms
Agree credit type, banks, dates, document set, charges and confirmation needs.

Issue and advise
Buyer applies; issuing bank issues; advising bank authenticates and advises.

Review before shipment
Seller tests every condition for feasibility and requests amendments early.

Ship and prepare documents
Seller ships on time and prepares the required presentation.

Present and examine
Nominated/issuing bank examines documents and handles compliance or discrepancies.

Honour or undertake payment
Sight, deferred, acceptance or negotiation proceeds according to the credit.

T/T flow

Fix the payment schedule
Specify deposit, balance, trigger, due date, evidence and beneficiary account.

Payer instructs the bank
The bank checks funds, FX, KYC/AML and payment data.

Correspondent routing
Intermediary banks may deduct charges or request information.

Beneficiary reconciles
Payment is complete only when available funds are credited and matched to the invoice.

D/P and D/A flow

Ship and prepare documents
Seller ships and prepares trade documents and a draft where used.

Issue collection instructions
Seller submits the documents and Collection Instruction to the remitting bank.

Send to collecting bank
The remitting bank forwards them to a bank in the buyer’s location.

Present to buyer
D/P demands payment; D/A demands acceptance of the time draft.

Release documents
The presenting bank releases only under the collection instruction.

Remittance / maturity handling
D/P proceeds are remitted after payment. Under D/A, the time draft is handled and presented for payment at maturity in accordance with the collection instruction, without creating a bank payment undertaking.

RISKS AND COMMON ERRORS

Error	Cause	Impact	Control
Choosing by habit	No review of counterparty, country, goods or liquidity risk.	Misallocated risk and funding pressure.	Use a risk matrix before quoting and contracting.
Impossible L/C documents	Copied clauses, vague conditions or buyer-dependent evidence.	Discrepancies, delays, refusal or waiver dependence.	Review immediately and amend before shipment.
Treating L/C as quality assurance	Failure to distinguish documents from goods.	Quality disputes remain after honour.	Use inspection, warranty and claim clauses separately.
Writing only “T/T”	No percentage, trigger or due date.	Different expectations and payment disputes.	State percentages, dates, events and evidence.
Using D/P with weak cargo control	Goods can be released without originals or move under waybill/AWB conditions.	Buyer may access goods while document leverage is weak.	Review transport document and release process.
D/A without credit assessment	Acceptance mistaken for a bank guarantee.	Buyer receives goods and defaults at maturity.	Set credit limits and consider aval, guarantee or insurance.
Incomplete collection instruction	No direction on charges, interest, protest, partial payment or storage.	Poor exception handling and extra cargo costs.	Provide clear, complete instructions aligned with the contract.
Payment-detail fraud	Bank coordinates changed through unauthenticated email.	Funds diverted and difficult recovery.	Independently verify any account change through a second channel.

RULES AND OFFICIAL SOURCES

Sources reviewed on 20 July 2026. UCP 600 applies where the credit states that it is subject to UCP; URC 522 applies where it is incorporated into the collection instruction. ISBP 821 is not a separate rule set that normally needs incorporation: it reflects international standard banking practice to be read with UCP 600. Contracts, mandatory law and bank compliance requirements must still be checked separately.

Source	Scope	Use	Note
UCP 600	Documentary credits	Bank undertakings, presentation, examination, refusal, transport and insurance documents.	Applies where the credit states it is subject to UCP 600; ICC currently identifies UCP 600 as the latest edition.
ISBP 821, 2023 edition	L/C document examination practice	Detailed practice for invoices, transport, insurance, origin and other documents.	Read with UCP 600. ISBP reflects document-examination practice and is not normally incorporated separately into a credit; it neither amends UCP 600 nor replaces the credit terms.
URC 522	Documentary collections	Framework for D/P, D/A, collection instructions and bank roles.	Applies when incorporated in the collection instruction.
ICC–BAFT–TTP Practical Guide to Documentary Collections, 2026	D/P and D/A operations	Parties, operational risks, compliance and practical collection handling.	Operational guidance, not a substitute for contract or legal advice.
ICC Academy – What is trade finance?	Payment-method comparison	Explains the risk ladder from advance payment through documentary methods to open account.	The actual risk order depends on the transaction structure.
SWIFT – What is Swift?	Cross-border transfers	Explains that SWIFT is a secure financial messaging network, while banks and financial institutions execute the actual movement of funds.	A SWIFT message or payment-instruction copy is not, by itself, proof that cleared funds are available in the beneficiary account.
eURC Version 1.1	Electronic collection records	Supplements URC 522 for electronic presentation.	Requires appropriate incorporation and technical arrangements.

Translation note: This English version is for operational reference and is not a legal translation of any national law.

FAQ

1. Does an L/C guarantee that the seller will be paid?

Not absolutely. Payment depends on a complying presentation and remains exposed to bank, country, sanctions, fraud and feasibility risks. Confirmation can reduce some issuing-bank/country risk.

2. Is T/T always an advance payment?

No. T/T is an electronic transfer. The contract may require advance, deposit, milestones, copy-document payment or post-payment.

3. Is D/P as secure as an L/C?

No. D/P has no issuing-bank payment undertaking and the buyer may refuse payment. Its leverage also depends on whether the documents genuinely control delivery.

4. How does D/A differ from open account?

Both can give buyer credit. D/A uses a documentary collection and usually an accepted time draft; open account normally creates a receivable without bank-controlled document release.

5. Is a deferred-payment L/C the same risk as D/A?

No. Following a complying presentation, the issuing bank owes payment at maturity under a deferred L/C. D/A primarily relies on the buyer unless separate bank security is added.

6. Can the contract use “D/P 30 days”?

The phrase is ambiguous. Under URC 522, where a collection includes a future-dated draft, the collection instruction should clearly state whether documents are released against acceptance or against payment. If documents are to be held until payment at maturity, state the D/P-at-maturity condition expressly and allow for delayed document release; if documents are released on acceptance and payment follows later, the structure is D/A.

7. What is suitable for a new counterparty?

Common options include a controlled deposit/balance T/T structure, an irrevocable L/C or a confirmed L/C depending on risk. Document capability and bank costs must be assessed as well as credit risk.

APPLICATION NOTE: The method name is only the first layer. Before signing, fix percentages, dates, triggers, documents, banks, charges, currency, release conditions, discrepancy/refusal handling, claims deadlines and the contingency for compliance blocks.

TGIMEX IMPLEMENTATION SUPPORT

TGIMEX helps businesses turn the article into a shipment-ready checklist, covering input-data review, dossier preparation, milestone control, and coordination with the relevant parties.

Convert guidance into checks

Assign an owner and deadline to every operational control point.

Reconcile shipment data

Compare booking, transport, commercial, customs, and delivery evidence.

Manage operational risk

Record discrepancies, actions, and decision evidence to prevent recurrence.

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