The Singapore High Court has allowed adding non-fungible tokens (NFT) containing legal documents to cold wallets associated with a hack, according to a statement made by UK-based financial research company Intelligent Sanctuary (iSanctuary).

The worldwide freezing order issued by the court was tokenized as soulbound NFTs and added to the wallets in question. NFTs will not block transactions with wallets, but will be used to alert counterparties and exchanges that wallets have been involved in a hack. Additionally, iSanctuary claimed to have developed a method to track funds leaving wallets thanks to NFTs. NFTs will remain permanently tied to wallets.

iSanctuary explained on its website that it was hired by a businessman who lost $3 million in crypto assets and managed to track the stolen funds. Moreover:

"On-chain and off-chain evidence was presented to the Singapore High Court by an iSanctuary senior investigator, and this world-first injunction was granted. iSanctuary financial and crypto researchers identified a number of cold wallets and NFT-servicing methods holding criminal proceeds and accepted by the court."

Additional details were not provided. iSanctuary named Mintology, an app created by Singaporean NFT studio Mintable, as the company that produces NFTs. This was indirectly confirmed by Mintable founder Zach Burks in a post on X (formerly Twitter).

NFTs have been used to deliver court notices in Italy and the United States.