International trade relies on trust. When buyers and sellers operate in different countries, they often need a secure way to guarantee payment and shipment. This is where a Letter of Credit (LC) becomes one of the most important financial instruments in global commerce.

Whether you're a CFO, treasury manager, procurement professional, or finance executive, understanding how the Letter of Credit process works can help reduce risks, avoid costly delays, and improve cash flow.

In this guide, we'll walk through every stage of the Letter of Credit lifecycle—from the initial purchase order to final payment.

What Is a Letter of Credit?

A Letter of Credit (LC) is a financial guarantee issued by a bank on behalf of a buyer, assuring the seller that payment will be made as long as the agreed terms and required documents are submitted correctly.

It acts as a safeguard for both parties:

• The buyer gains confidence that payment won't be released until shipment requirements are met.
• The seller receives assurance that payment is backed by a reputable financial institution rather than depending solely on the buyer.

Because of this security, Letters of Credit are widely used in international trade, manufacturing, construction, energy, and other industries dealing with cross-border transactions.

Step 1: Purchase Order Agreement

The process begins when a buyer and supplier agree on the purchase terms.

The purchase order typically includes:

• Product specifications
• Quantity
• Price
• Shipping terms
• Delivery schedule
• Payment method

If both parties agree to use a Letter of Credit, this requirement becomes part of the commercial contract.

Step 2: Buyer Requests a Letter of Credit

The buyer submits an LC application to their bank, often called the issuing bank.

The bank reviews several factors before issuing the LC, including:

• Creditworthiness
• Available credit facilities
• Existing banking agreements
• Transaction value
• Trade documentation

If approved, the bank creates the Letter of Credit according to the agreed contractual terms.

Step 3: The LC Is Sent to the Advising Bank

The issuing bank transmits the Letter of Credit to the seller's bank, known as the advising bank.

The advising bank verifies the authenticity of the document before notifying the exporter that the LC has been received.

At this point, the seller carefully reviews every condition to ensure they can comply before shipping the goods.

Step 4: Goods Are Manufactured and Shipped

Once the seller accepts the LC terms, production or preparation begins.

After shipment, several trade documents are generated, such as:

• Commercial Invoice
• Bill of Lading
• Packing List
• Certificate of Origin
• Insurance Certificate (when required)

The exact documentation depends on the LC conditions.

Step 5: Documents Are Submitted to the Bank

The seller submits all required documents to the advising bank.

The bank examines each document to ensure it matches the Letter of Credit exactly.

Even small discrepancies—such as spelling mistakes, incorrect dates, or missing signatures—may delay payment.

This document review stage is one of the most critical parts of the entire process.

Step 6: Documents Are Reviewed by the Issuing Bank

The issuing bank performs another compliance review.

If every condition has been satisfied, the bank honors the Letter of Credit by releasing payment according to its terms.

Depending on the LC type, payment may occur:

• Immediately (Sight LC)
• At a future agreed date (Usance LC)

Step 7: Buyer Receives Documents and Goods

Once payment is authorized, the buyer receives the shipping documents needed to claim the goods from the carrier.

The transaction is now complete, with both parties fulfilling their contractual obligations.

Common Challenges in the Letter of Credit Process

Although Letters of Credit improve payment security, managing them manually often creates operational challenges.

Some of the most common issues include:

Manual Document Tracking

Many organizations still rely on spreadsheets and email chains, making it difficult to monitor LC status.

Missed Expiration Dates

Failure to monitor expiry dates or shipment deadlines can result in rejected documents and delayed payments.

Document Discrepancies

Minor errors can lead to additional bank fees, delayed processing, or payment disputes.

Limited Visibility

Finance teams often struggle to understand the real-time status of multiple LCs across different banks and business units.

Time-Consuming Approvals

Manual approval workflows can slow down procurement and international trade operations.

How Letter of Credit Automation Improves Efficiency

Modern treasury and trade finance platforms help organizations digitize the entire LC lifecycle.

Automation can help businesses:

• Track every LC from creation to closure
• Receive automated reminders before critical deadlines
• Reduce manual data entry
• Improve document accuracy
• Centralize communication with banks
• Gain real-time visibility into outstanding trade finance activities
• Simplify audit preparation and compliance reporting

Instead of managing multiple spreadsheets and email threads, treasury teams can oversee all Letter of Credit activities through a centralized workflow.

Best Practices for Managing Letters of Credit

Organizations handling frequent international transactions should consider these best practices:

• Standardize LC request procedures across departments.
• Review all contract terms before requesting an LC.
• Verify document requirements early in the process.
• Monitor expiry and shipment deadlines proactively.
• Maintain a centralized repository for all LC documentation.
• Consider automating repetitive treasury workflows to improve visibility and reduce operational risk.

Final Thoughts

Letters of Credit remain one of the most reliable payment mechanisms in international trade, helping buyers and sellers conduct business with greater confidence.

However, as transaction volumes increase, manually managing Letters of Credit can introduce delays, errors, and unnecessary administrative work.

Organizations looking to improve treasury efficiency are increasingly adopting digital solutions that centralize Letter of Credit management, automate workflows, and provide real-time visibility across banking relationships. Platforms such as Bankors help finance and treasury teams streamline the entire LC lifecycle while maintaining stronger control, compliance, and operational efficiency.

Understanding the complete Letter of Credit process is the first step toward building faster, more secure, and more efficient international trade operations.