HPD
In an HPD, you will find the Certificate ID labeled as 'HPD Unique Identifier' at the top of the description section as shown in the screenshot below.
GreenGuard Gold
In a GreenGuard Gold certificate, you will find the Certificate ID labeled as 'Certificate Number' on the top right as shown in the screenshot below.
GreenGuard
In a GreenGuard certificate, you will find the Certificate ID labeled as 'Certificate Number' on the top right as shown in the screenshot below.
Cradle to Cradle
In a C2C certificate, you will find the Certificate ID labeled as 'Certificate Number' on the top left as shown in the screenshot below.
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