I am not from PayPal, I am using Plimus to get PayPal payments from my customers. Recently one customer paid me through his UNVERIFIED PAYPAL, I want to know that is it possible that he had paid me using his credit card?. Because I had looked into PayPal FAQ's it was written that if you want to become verified you need to attach your Bank Account or Credit Card. So guyz, he must have paid me through his PayPal balance? Need your answer, Thanks.
It depends on what country he is in. For US accounts, you verify them by linking a bank account, not a credit card. I'm pretty sure that unverified US account holders can make payments via credit card.
He must have used PayPal funds to do that if the account is not linked to a credit card or a bank account.