You need some kind of a security code / pin system to prevent against fraud. Venmo has to match the pin in the message sent along with the phone number the mes

You need some kind of a security code / pin system to prevent against fraud. Venmo has to match the pin in the message sent along with the phone number the message is sent from. And proceed with the payment only if the pin matches. Venmo $10 to Jenny 1990 Where the last 4 digits of the message - 1990 in this case - is the security pin code.