Verify a result

Every Grammage badge placed on a site points here, to the verification page of its domain, and that page is the one that counts. You will find the figures Grammage really measured, the date of the measurement, the period during which the attestation remains valid, and the official documents to download with their fingerprint, which lets you check that a document you were sent has not been altered.

If you have seen a badge or received an attestation, you only have to type the domain of the site above to compare what you were shown with what is published here.