Offtopic: PayPal shares more than we think it does. I've had issues where certain merchants asked me to confirm identity by sending copy of utility bill for address I had on PayPal account. I thought my address is private so sent a bill for my siblings house where I also paid the bills for internet, but they reported that address is not same with PayPal, so I argued a bit but eventually had to send one for correct address. I think that, PayPal doesn't share CVV but merchants can view all personal info attached to my PayPal account.