What makes kopi Luwak real and authentic?
One answer only: official government supported authenticity
A certified authentic Arabica kopi Luwak, must have a Certification of Authenticity issued by Indonesia’s government body that officially monitors and supervises nationwide coffee and cocoa plantation: Indonesian Coffee and Cocoa Research Institute (ICCRI).
Here’s a sample of certification: the Attestation of Origin;

Attestation of Origin Kopi Luwak for Kopirama.com by ICCRI (Indonesian Coffee and Cocoa Research Institute)
Please note that the certification above is not a business permit nor a food testing result (issued by Sucofindo), like what any other site’s use to ‘authenticate’ their kopi Luwak.
Sucofindo, an Indonesian government’s official inspection institution, only analyzes the parameter of a coffee sample (its moisture, mesh size, bean defects, etc.), and it does not have the authority to declare that a certain coffee presented to them is a type of coffee, especially in this case, a Luwak coffee.
Kopi Luwak sellers may have their own business permit, and they must not use the permit to falsely represent it as a Certificate of Authenticity, especially if the document is written in local language, which most of international customers may not understand of.
Luwak coffee (‘kopi’ is Indonesian for ‘coffee’) is a legendary species of coffee that can only be found in Indonesia. Due to its rarity, very limited annual production, and premium price, there are studies that almost half the beans marketed under the name ‘kopi luwak’ for sale are either adulterated or fake Luwak coffee.
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