[aabhay]

So, how do you know when the NFT is invalid? Can Mattereum just freeze any token at any time? If I transfer my token back to them and they don’t give me my thing, how do we all know? What if the thing is damaged? What if my country holds it up at customs?

[DennisP]

I don't know but since they spent a lot of time developing real-world legal contracts, I suspect there are decent answers.

Art vaults/registries have similar issues and work fine for much more valuable items, so Mattereum isn't breaking completely new ground here. They just have a more convenient way to transfer ownership.