The debt collector would run through the list of proofs when buying the debt without the proof. Automatically. The spreadsheet would, as well as name and addres

The debt collector would run through the list of proofs when buying the debt without the proof. Automatically. The spreadsheet would, as well as name and address or whatever it already has, list a smart contract ID and a signature proving ownership of the private key currently registered to it. Transfer of debt could even be an atomic blockchain transaction, moving the debt and the money in the same transaction. Some would probably buy proofless unpaid debt, but it would be almost worthless. > How much harder would it be for the debtor to prove that they don't actually owe the money in question? I refer you to the aforementioned dystopia. Even today, if your credit card is used in a transaction involving the physical card and your PIN, it's presumed you agreed to pay.