Hi I have successfully Integrated PayPal Checkout Smart Payment Buttons, where i am using custom payee reference https://developer.paypal.com/docs/checkout/integration-features/custom-payee/
My point is if the custom payee email is invalid still the payment completes and the fund goes to the account of the API credentials owner. But I don't want that. IF custom payee email is wrong the payment should not be successful, it must throw a error with proper message so i can catch the error.
