The exchanges where you can trade Bitcoin and cryptocurrencies handle proof of funds differently. You can find our information pages on Bitpanda, Binance and Kraken here: Proof of source of funds at Kraken Origin of funds at Coinbase Proof of funds at Bitpanda Source of wealth at Binance Proof of source of funds at Bitstamp Difficulties arise due to the fact that crypto exchanges are domiciled in different jurisdictions. Therefore, the same legal situation regarding proof of origin for Bitcoin and other cryptocurrencies does not apply everywhere.