Ah yes, fake vaccination certificates.
People caught with those, or caught making those...should be sent to work in the salt mines for a while.
Forge-proof National Identity Cards and forge-proof vaccination cards can be made eventually...see anyone forging Australian bank notes.
Saw something on my tv news about stopping fake vaccination certificates...Something about a govt phone app, a digital certificate with photo, the airline etc checks the cert on app, then compares that to other photo ID of the holder, and allows them to fly, enter restaurant, the opera, Broadway-ilk, sporting events etc.
Like my digital drivers licence on my state govt app.
If I forget my wallet, no problem, I have my digital photo licence.