If you already own a diamond that has been certified by one of these three institutes, you can check its authenticity yourself online.
With the online report check, you can quickly and easily make sure that the information in your report matches the information archived in the report database.
The link provided by the issuer of your certificate will take you directly to the provider's report check page. Simply enter the number of your certificate there and you can compare the information displayed online with your printed certificate. This means that counterfeit certificates don't stand a chance.