At the end of the day, when accepting these payments the only way to truly verify if it’s legit is to redeem it to your lightning node.
For the offline mint case you could really only do that with a whitelist of mints you trust, which isn’t actually that bad.
Although it would be bad for the user, since they likely wouldn’t have the exact same mint that is whitelisted, so the offline benefits dematerialize
If the receiver wants to give the sender this kind of assurance then it should be on the receiver to choose a trusted mint. And if the sender is not cool with the receiver's chosen mint then it should be on the sender to make the receiver aware of that.
I see a future with a large number of trusted mints, including mints that are guaranteed. So even if you don't trust the mint but you trust the guarantor then you're still good. And if you trust both then I guess you're double good.
