How to redirect an existing user after a new purchase

#1

Hi all,
When an existing logged-in user buys another or additional membership they stay, after completing the payment, at the checkout form with a message saying ‘Congratulations…etc.’.
I want them to be redirected to a specific page or the ‘Login Welcome Page’. (This is what happens when they register or buy something for the first time, but not when they buy additional items.)
How can I do that?

#2

You can use the success="" attribute in your Pro-Form shortcode to redirect the user to a URL of your choosing. See this KBA: http://s2member.com/kb-article/creating-a-registration-thank-you-page/. If you are using a button shortcode, make sure you read the last section on that page (What About Billing Modifications?) as modification forms with buttons are a special case.