Coaching Genie allows you to use the shopping cart of your choice such as PayPal.
After someone purchases your course or program, you can simply add the client link by clicking the "Copy Link" button.
Then add this link to a thank-you page inside your shopping cart or PayPal thank-you page after they purchase. Or, include it inside the welcome email.
You can also use Coaching Genie's built-in shopping cart which is currently integrated with Stripe.
For detailed instructions, please refer to this article:
How to Create a Landing or Sales Page to Sell Your Program