# Transfer on Sale

> Atomic, trustless digital asset transfer. A private key is reconstructed and transferred to a buyer only when all transaction conditions are cryptographically verified: payment confirmed, regulatory sign-off received, counterparty approved. No escrow agent required.

## The Problem

Trading or transferring custody of a digital asset that is controlled by a private key historically requires a trusted intermediary — an escrow agent, a custodian, a clearing house — to ensure the key is only handed over once payment and conditions are met.

## How Phantom Secrets™ Solves It

The transfer policy is encoded as preconditions for reconstruction of the key (or for re-keying to the buyer's new key material). Until every precondition is cryptographically satisfied — payment on-chain, sanctions check passed, regulatory approval signed — the key cannot exist for either party. When all conditions are met, the key materialises for the buyer and the seller's ability to reconstruct is permanently revoked.

## Use Cases

- OTC digital asset settlement
- Tokenised securities transfer
- Inter-custodian transfers
- M&A involving digital assets, signing keys, or cryptographic IP

## Related

- Digital Asset Custody solution: /api/md/solutions/digital-asset-custody
- Phantom Secrets™: /api/md/products/phantom-secrets