The issuance of certificate is discretion of the refineries. Most of world gold coins (Maple Leaf, Australian Kangaroo, Krugerrand, etc) are minted and sold without the certificate. Their value still holds even without the certificate. Kelantan Dirham?
This is the first time in the last 100 years, since the fall of the Ottoman Caliphate, when a Muslim government introduces Shariah Currency. Indeed there has been four generations of Muslims who have not seen Gold Dinar and Silver Dirham; four generations of Muslims who have been divided into little national reservations and sentenced to permanent robbery first by local, then by international Masters of Riba; four generations of Muslims who haven’t known what is their Deen. The introduction of Gold Dinar and Silver Dirham in the state of Kelantan is not a new idea or experiment, it is the return to the medium of exchange that has been known for 1400 years throughout Dar al- Islam as Money of Shariah taking its legislation from Allah’s Revelation and Rasul’s Sunnah.