I am using Pay flow Pro for payment in project, its working fine. I am getting transaction number in response while i am making any payment. Now i have a requirement to use that transaction number for further payment in future. Reference Transaction payment is possible as i can read the documentation of PayPal, but i am not sure or didn't find if this possible with Pay flow pro? Could anyone help me out with this. How to make a payment with reference transaction in Pay flow Pro PayPal?