Just to clarify - let's say someone wants to setup a cash>BTC ATM machine. Ignoring the state requirements for a moment - what constitutes compliance at the Federal level? I see many of these machines simply asking for a. fingerprints b. IDs or c. cellphone numbers alone to enable transactions. Would these methods suffice to KYC at the federal level? I know the states can make things vastly more complex but again, ignoring the states for a moment.