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WCO

World Customs Organization

Terms, metrics, and workflows around Amazon Seller, Vendor, and Marketplace operations.

By the SPACEGOATS TeamLast reviewed: April 2026

What it means

WCO (World Customs Organization) is the international body that sets customs standards and procedures. WCO standards matter for sellers shipping internationally, especially for cross-border customs clearance. Good knowledge of WCO classifications and documentation can reduce customs delays. Sellers should classify their HS codes (Harmonized System) according to WCO standards.