How do I control the Thank You email sent by wixPayBackend.createPayment?

When I run wixPayBackend . createPayment a thank you email is sent to the user with the subject line " Thanks for your payment to ".

I’d like to change that email, or stop it from sending so I can send my own Triggered Email, but I can’t figure out where it comes from. It’s not a Triggered Email and I don’t see it in Automations.

Any clues?

UPDATE: I now realize this is a question about forms in general, not specifically the createPayment API. If a form allows payments a Thank you email is sent on top of the invoice email and your own automated email. So the user potentially gets THREE emails that all say more or less the same thing. How can I stop that “Thanks, we received your submission” or “Thank you for yoru payment to…” email from sending?