A Satoshi Test is a way to prove ownership of a cryptocurrency wallet: the holder sends a small, uniquely-sized amount from that wallet to a one-time address named by the verifier. When the transaction confirms on-chain, it demonstrates the sender controls the wallet's private keys, without ever revealing them.

Know Your Wallet (KYW) is a compliance process that assesses a cryptocurrency wallet rather than only its owner. It combines identity verification (KYC), on-chain transaction screening (KYT/AML), and cryptographic proof of wallet ownership into a single assessment, expressed in CryptoPass as a KYW score from 0 to 100.

KYC (Know Your Customer) verifies who a person is. KYT (Know Your Transaction) screens what their transactions touch on-chain. KYW (Know Your Wallet) ties both to a specific wallet: it confirms the verified person actually controls the wallet and that its history is clear of sanctioned or illicit exposure.

Source of funds (SoF) is the origin of the money used in a specific transaction: where these particular assets came from. Compliance teams request SoF documentation to confirm assets are not proceeds of crime. It differs from source of wealth (SoW), which explains how a person built their overall net worth.

An unhosted wallet, also called self-hosted or non-custodial, is a cryptocurrency wallet whose private keys are controlled by the user rather than by a regulated intermediary. The term comes from FATF guidance and EU regulation; transfers between exchanges and unhosted wallets face additional verification under the EU Travel Rule.

The FATF Travel Rule (Recommendation 16) requires financial institutions, including crypto-asset service providers, to collect and transmit originator and beneficiary information alongside transfers, so funds cannot 'travel' anonymously between institutions. In the EU it is implemented by the Transfer of Funds Regulation (EU) 2023/1113, applying to crypto transfers since 30 December 2024.