Private Key Control Procedure (PKCP)

Self-hosted wallets (also referred to as unhosted wallets) fall under the scope of the FATF’s Travel Rule. When a transaction occurs between a VASP and a self-hosted wallet, the wallet  owner needs to demonstrate that they control the private key linked to it*.  

VASPs can safeguard against sending funds to wallets their user does not control by requesting a proof of private key ownership.

Private Key Control Procedure can be conducted in various ways, namely via: 

• Address Ownership Proof Protocol (AOPP) 

• A Satoshi Test 

• Manual Signing, or  

• By Visual Proof (or Screenshot)

Read more about self-hosted wallet private key control methods here. 

Private Key Control Procedure is also known as Wallet Ownership Proof.

*Different regions have different interpretations of this Recommendation. Be sure to verify what your region requires before proceeding with a transaction.