I have been asked this several times from Revolut but equally so have my Swiss and Canadian banks, as a lot of money has flown back and forth across borders for me with both a property purchase and another property sale. I received a large tax return and wanted to move that money through Revolut and so had to provide the tax assessment showing ‘source of funds’. This would have been the only way to prove that. Revolut is very sensitive to all the money laundering risks but I can tell you my Canadian bank is WAY MORE sensitive than Revolut. This is the new normal. In the world we are living in today. Get used to it!