Korea Customs Service (KCS) has introduced a registration system for Cross-Border E-commerce Business Identification Numbers to enhance the management of cross-border E-commerce shipments and facilitate efficient customs clearance.
Accordingly, businesses handling cross-border E-commerce shipments in S. Korea are required to register for a Cross-Border E-commerce Business Identification Number through the dedicated registration system.
Eligible Businesses
Overseas businesses operating an online marketplace and offering shipping services to S. Korea.
Domestic businesses operating an online marketplace or selling through an online marketplace that provide cross-border E-commerce purchasing agency or sales intermediary services.
Domestic and overseas businesses providing international forwarding services for cross-border E-commerce shipments destined for S. Korea.
* Businesses previously registered with Korea Customs Service as purchasing agents or E-commerce businesses must also re-register through the new registration system.
Key Date
August 28, 2026: Launch of the dedicated customs clearance platform for cross-border E-commerce.
* The registered Cross-Border E-commerce Business Identification Number will be used in the dedicated customs clearance platform and will become a mandatory data element for import declarations and customs manifests.
When Using the Dedicated Cross-Border E-commerce Declaration Format
After completing your UNIPASS registration, you must submit customer and transaction information to the Korea Customs Service through an API connection.
Courier Junction must be able to receive your customer and transaction information in order to submit import declarations using the dedicated cross-border E-commerce declaration format.
* When the dedicated declaration format is used, import declarations can be accepted immediately upon cargo arrival, enabling faster customs clearance.
When the Dedicated Cross-Border E-commerce Declaration Format Cannot Be Used
The business is not registered as a cross-border E-commerce business.
Customer and transaction information cannot be submitted directly to Korea Customs Service through an API connection.
* In these cases, shipments arriving in Korea will be treated as person-to-person (C2C) transactions, resulting in a significantly higher likelihood of customs inspection. In addition, the shipments will not be eligible for De Minimis import declaration process and must instead undergo a formal import declaration. As a result, customs clearance and delivery may be delayed. However, please note that De Minimis process will still be permitted during the grace period provided by the Korea Customs Service until December 31, 2026.
How to Register
Registration website: https://unipass.customs.go.kr/ecb/ovrs/index.do
The following documents are required for registration:
Mail-Order Business Registration Certificate
Internet Domain Registration Certificate
Business Registration Certificate
Corporate Registration Certificate (if applicable)
National Tax and Customs Tax Payment Certificate, etc.
This new registration system is intended to improve the management of cross-border E-commerce businesses and establish a safer and more efficient customs clearance environment.
To ensure smooth international shipping and customs clearance, eligible businesses are encouraged to complete their Cross-Border E-commerce Business Identification Number registration in advance and prepare the necessary API connection to submit customer and transaction information.
Reference:
Korea Customs Service (Exclusive Portal for E-Commerce Businesses) – registration
https://unipass.customs.go.kr/ecb/ovrs/index.do
