So I have a VISA card with my bank account. Whenever I buy something online, it requires me to sign the transaction through the app with a passcode.
Is there no such thing for the MCO card? I noticed that for online purchases, nothing is needed: No PIN, no password. Can anyone who has my VISA card number make payments in my name? Isnt that a huge flaw? The only way to prevent this seems to me to keep the number secret. But whenever entering it into the form of a service it is not secret anymore, so thats not really an option.