Once you add a card to your PayPal wallet, we’ll automatically monitor for fraud 24/7 and work to prevent bad actors from using cards in your PayPal wallet. If we spot certain early warning signs, we’ll block the attempt, alert you in real-time, and share some details about the unusual activity. Early warning signs of fraud include:  

• Someone making an unusual attempt to add your card to their PayPal wallet   
• Someone using your card as part of a suspected “carding attack” at a PayPal merchant    

Note that real-time alerts aren’t currently available for PayPal-branded credit and debit cards. You can feel confident, though - these cards can’t be added to another PayPal wallet and we’ll continue to monitor them and block any unusual activity.