Hello!
I'm creating a website that is similar to selly.io / sellfy.com. that allows the user to set their own paypal address, and recieve payments through their own paypal address. The problem with that is that, we will need to user to add additional settings to their paypal accounts etc to be able to track the payment through our website to see that it has been sent. How can we setup the same system as selly.io / sellfy.com where they only require the users paypal address and once the payment is completed they get redirected to our website? Without them changing additional settings on their account.
