konichiwa!~

i dont think that there is an option yet to leave 
it in your credit card, unless (being unverified) 
you have yet to add a bank account.  not sure, 
though.

here's their service information for you, though:

"Customer Service Center 

PayPal Customer Service Agents are available to 
help you 24 hours a day Monday to Friday, and 
from 4:00 AM PST to 10:00 PM PST on 
Saturday/Sunday. 

Call us toll-free at: 1-888-221-1161 

We may only discuss an account with the account-
holder. Please have the following information 
available when you call: 

Your telephone number 
Your email address 
The last 4 digits of your credit card or bank 
account registered with PayPal 

For security reasons, we must verify the above 
details before discussing any account-specific 
information."

hope that helps,

haruna