Supplier Declarations Behind a Korean Certificate of Origin: What Your Exporter Must Hold for 5 Years

What is a supplier's declaration of origin in Korea?

A supplier's declaration of origin, called 원산지확인서 in Korean, is a document in which the company that produced a material or the finished goods confirms their origin to the exporter who sells them abroad. It is created under Article 12(1) of the Enforcement Rules of Korea's FTA Special Customs Act, may be issued electronically, and follows a prescribed form.

The reason it exists is straightforward. An exporter who buys finished goods or components from another Korean factory cannot personally verify where they originate. Only the maker knows. So the maker signs a declaration, and the exporter uses it as the basis for applying for the certificate of origin you eventually receive.

How is it different from the certificate you receive?

They cover different links in the same chain.

The certificate you hold is an output. The declaration is the input. When the input is missing, the output does not survive verification, which is why a clean-looking certificate is not by itself evidence that the file behind it is complete. The issuing side of that certificate is covered separately in certificates of origin and FTA duty.

Which documents sit behind the certificate?

Four documents are commonly grouped together as "origin paperwork" in Korea, but they move in different directions.

The origin statement is the odd one out. The other three move inside the supply chain, while the statement goes from the exporter to Korean Customs or the Chamber of Commerce, explaining how the goods meet the applicable rule of origin. If the issuing body cannot confirm compliance from what was filed, it can demand the underlying evidence and a domestic manufacture declaration on top (Article 10(2)).

How long does a periodic declaration stay valid?

Up to 12 months from the date the goods are supplied (Article 12(2)). It is available only where a supplier delivers to the same producer or exporter on a continuous and repeated basis, and it lets the first declaration be reused across that window instead of being reissued per shipment.

The detail worth flagging to your supplier is the starting point. The rule runs from the supply date, not from the date the paperwork was signed. A periodic declaration covers the supply period written into it, so a file that looks current can already be outside its window. The domestic manufacture declaration works the same way (Article 13(2)).

What if the Korean supplier will not issue one?

Nothing in Korean law compels them to. Article 12(1) says the supplier may provide the declaration on request. There is a right to ask and no duty to comply.

In practice this is solved in the supply contract rather than by statute, and the same logic applies to your own purchase terms with the Korean exporter. Suppliers most often refuse because a declaration would expose cost structure or formulation to a customer. Where that is the obstacle, Korean rules leave a path: when the exporter and the producer are different companies, the producer may file the origin statement and supporting evidence directly with the certificate-issuing body (proviso to Article 10(1)4, and Article 10(2)). The exporter never sees the cost data and the certificate still issues. It is worth naming that route explicitly when a Korean counterparty says a declaration is impossible.

Whether the goods qualify in the first place is a separate question, set out in Korea's rules of origin.

When does the paperwork have to exist?

Before the goods leave. An application for an issued certificate must be filed before loading of the export goods is completed (Article 10(1)), and the declarations and statement are attachments to that application. A supplier chased after departure is being chased late.

There is a fallback: where the filing was missed through negligence, error, or other unavoidable cause, the application may be made within one year of the shipment date (Article 10(3)). It is an exception, not a schedule to plan around.

Issuing time matters for your own lead time.

Saturdays, Sundays and public holidays are excluded from these counts (Article 10(7)), so three days means three working days. A first-time applicant with no domestic production facility, or one who does not produce the goods directly, is subject to an on-site check (Article 10(4)). On a first order with a new Korean trading company, plan against the ten-day path.

How long must the records be kept?

Korean exporters and producers must keep origin documents for five years from the date the certificate of origin was written or issued (Enforcement Decree Article 10(2)2). Where the counterpart country is China, the Korea-China FTA sets three years instead.

What counts as a record is the part that catches people out. Enforcement Decree Article 10(1)2(e) puts documents prepared by the producer or by a supplier of materials for origin evidence and handed to the exporter squarely on the exporter's mandatory retention list. The supplier's declaration is not a working file; it is a statutory record. Failure to retain it without justification carries a fine of up to 20 million won (Act Article 44(2)3).

What breaks if the file is incomplete?

The verification does not start with you. Where a partner country's customs authority asks Korea to confirm whether origin documents for Korean export goods are genuine and accurate, the Commissioner of Korea Customs Service or the head of the customs office conducts a written or on-site investigation of the exporter or producer (Act Article 18(1)). Written investigations come with a document deadline, and where the response is incomplete the investigator sets a further period of at least five days for additional material (Enforcement Rules Article 22(3)).

If the exporter cannot produce the declarations, origin is not substantiated on the Korean side. Your preferential claim then fails under your own country's rules, and the cost lands on you as the importer of record before any contractual recovery from the exporter. The Korean exporter faces separate Korean exposure: a fine of up to 20 million won for preparing or obtaining origin documents by deception or improper means, and up to 3 million won where the misstatement was negligent (Act Article 44(2)1 and 44(3)).

What to ask your Korean supplier

1. Are you the producer, or are you reselling another factory's goods? If the producer and exporter differ, a supplier's declaration is a mandatory attachment to the certificate application (Article 10(1)3).
2. For repeat orders, is there a periodic declaration, and what supply period does it cover? Twelve months, counted from the supply date.
3. Does your contract with the producer oblige them to issue declarations and cooperate with verification? Korean law does not.
4. If the producer will not disclose costs, will they file the origin statement directly with the issuing body? That route exists.
5. Can you retrieve the file for a shipment from four years ago? Retention runs five years, and verification requests arrive against old entries.

The weak link in origin compliance is rarely the certificate. It is the declaration that should sit behind it, because nothing goes wrong on the day it is skipped. It goes wrong years later, when someone asks.

This guide reflects Korean rules as of August 2026 and is general information. The scope of goods eligible for simplified origin confirmation and the documents accepted as declarations are set by Korea Customs Service notice and can change. Confirm with Korea Customs Service and a licensed customs broker before relying on it.