Yes, for online transactions and bank transactions, one is an electronic transaction, one is a manual transaction, one does not have any paper evidence, and the other has an account opening certificate and documents. This is what all online exchanges face problem. But don’t worry, you can check online to display your shares and purchase records. If you are really worried, you can enter and COPY the displayed page and keep it as a voucher. I have thought about you and your purchase records before. I had the same problem as you, so I COPYed all the transaction records and shares from the website. However, after a long time, I felt it was nothing, so I deleted them all!