A certification you cannot sell, but an authority can revoke.
In Web2, credentials follow a specific lifecycle. A coding bootcamp issues you a certificate of completion. You cannot sell it or give it to someone else — it belongs to you. But the issuing institution retains the right to revoke it if they discover fraud or if the credential expires. Professional licenses, employee badges, verified status markers on social platforms — they all work the same way. They are yours to hold, but someone else controls whether they remain valid.
Solana's Token Extensions Program lets you encode this exact pattern at the protocol level using two extensions: non-transferable and permanent delegate.
How it works
The non-transferable extension locks tokens in place. Once minted to a wallet, they cannot be moved, sold, or traded. The permanent delegate extension gives your authority keypair the ability to burn tokens from any holder's account without their signature. Combined, they create a credential that is soulbound to the holder but revocable by the issuer.
