1.You may need to confirm the email address associated with your Paypal account.
2.There may be some problems about your funding source (inadequate balance or transaction being declined). Please contact your bank or issuing bank for more information.
3.You may have a limitation placed on your PayPal account. 
4.The seller's/recipient's PayPal account is limited.
5.You may need to go through a security check, so we can confirm your identity.
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Paypal Help Center
