Some possible reasons:
If you've tried to link your credit or debit card to your PayPal account, but received an error message, it may be because:
* The billing address you've entered for your PayPal account is different than the one on your card statement. What to do: Check your card statement to ensure both addresses match. If you are sure you've entered the information correctly, please call the card company to find out what they have on file. Sometimes, after a recent move, the information may take longer to be updated.
* A card can only be linked to one PayPal account at a time. What to do: If you already have a card linked, remove this card from your
account, then link the new one.
* Your card company did not accept the $1.00 authorization sent by PayPal when you attempted to add the card. What to do: Call your card company to find out why they are rejecting the authorization from PayPal. After they resolve the issue, try adding your card again.
* You linked your card to your PayPal account, but entered the card security code (CSC) incorrectly 3 times. What to do: Call PayPal. PayPal can help you finish linking your card. PayPal may ask you to provide some additional information.
* You have 8 linked cards on your account. What to do: Remove at least one credit card from your account. You can only have 8 linked cards on your account at once.
