You may think this is a daft question, just need to change the 3 digit security number on my bank card, new card, same account numbers etc just different security code, can't seem to find the option on how to do this.
If you need to change anything on the card you have registered with PayPal then you go to your PP account and select 'Wallet.' You will find your card information there.
If you want to change it on eBay you go to My eBay - Account - Personal information - Financial information
