A KP Certificate is the tamper-resistant export document mandated by the Kimberley Process Certification Scheme for every international shipment of rough diamonds between participating states. It is issued by the designated authority of the exporting country and must accompany the parcel from origin through customs clearance at the importing country.

Purpose

The certificate provides a government-level guarantee that the rough diamonds in the consignment are conflict-free, meaning they have not been used to finance armed groups seeking to overthrow legitimate governments. KP participants undertake to refuse imports of rough diamonds that arrive without a valid certificate, and to refuse exports to non-participants. The scheme is a closed circuit: rough flows only between participants, only with a certificate.

Required content

Each certificate carries a unique serial number issued under the authority of the exporting state. Required fields include country of origin or country of provenance, exporter and importer names, total carat weight, total value in US dollars, the Harmonised System tariff code, the date of issue, and a tamper-resistant security feature such as a watermark or hologram. Many participants add machine-readable barcodes for digital reconciliation. The format varies country by country within the framework set out in the Kimberley Process Core Document.

Handling

The original certificate must travel with the parcel; copies are not acceptable. On arrival, the importing country's KP authority validates the certificate, reconciles it against the shipment, and reports the import to the KP Statistics Working Group. Statistics are aggregated semi-annually and published on the official Kimberley Process website, providing one of the few transparent windows into the rough diamond trade.

Polished diamonds and the System of Warranties

KP Certificates apply only to rough. Once a stone is cut and polished it leaves the formal Kimberley regime. Continuity of the conflict-free claim is then maintained through the World Diamond Council's voluntary System of Warranties, in which each invoice for polished stones or jewellery containing polished stones carries a written statement that the goods originated from sources not involved in funding conflict and in compliance with United Nations resolutions.

Trade practice

For a manufacturing jeweller, a KP Certificate is rarely seen directly unless one is importing rough. Dealers and bench jewellers handling polished stones rely on supplier invoices that carry the System of Warranties statement and, increasingly, additional supply-chain documentation such as country-of-origin assertions, OECD due-diligence declarations, or membership statements from the Responsible Jewellery Council. The combined paper trail is what end customers are asking for when they ask whether a stone is Kimberley certified.