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To provide one of the safest online payment services our internal security system reviews every transaction before it's released. It’s similar to the way banks and credit card companies work when approving transactions. If your or friends' accounts have not yet been verified, I recommend following these steps https://www.paypal.com/us/smarthelp/article/how-do-i-verify-my-paypal-account-faq444 to verify your accounts.
