Timebank NFTs are used as receipts and references, not as collectibles or speculative assets. They represent pledges, agreements, and verified outcomes in a way that is portable across ledgers. In most designs they should be soulbound or otherwise non-transferable so that promises and reputations cannot be traded like commodities.
The first type is the Pledge NFT. It encodes what is being promised, how many hours, what constraints apply, and when it expires. The pledge is the basis for credit underwriting in the Pledge Bank. It can be reserved or locked when used to back a credit line so that it cannot be duplicated across chains.
The second type is a Completion Attestation. It references a specific agreement and records that the work was delivered and accepted, optionally with mediator or assembly signatures. Evidence can be stored off-chain with hashes on-ledger. Completion affects both balances and reputation and can trigger automatic credit-limit adjustments.
The third optional type is a role or Governance Credential for mediators, auditors, and assembly facilitators. This lets the system scale dispute resolution and quality assurance without central administrators. NFTs here are not “ownership” so much as durable, inspectable public memory.