How to find your PayPal account number Some applications ask for  paypal account number but what i think they should be asking is for paypal ID merchant number since PayPal doesn’t not  use account numbers. Your registered email address on your PayPal account is used the same way as an account number. So incase asked for PayPal account ,u can put PayPal merchant ID and this usually applies  to only business accounts. Where Can you  Find your  Paypal Merchant ID…