Are you talking about the C5 registration process? If so, then an email is already sent (if you set up the registration to require validation of accounts by email).

If you want to make changes to the registration process and/or email, then you'll need to copy concrete/controllers/register.php into controllers/register.php and make changes there. Don't alter the original.

If you're talking about something else, then please post some more detail of what it is you're doing.

This is what I am trying to do:

On my website I want people to register for a fitness show.

1. They will register their info on the website
2. They will then be directed to paypal and they will pay their registration.
3. I want to somehow generate an email thanking them and confirming their registration... over and above paypal.

I realize that the form add on already has a message.

Is there anything like this?

Thanks so much for responding

I'm still not entirely sure whether you're using the C5 registration process, or whether you're just selling something.

There is a membership addon:
http://www.concrete5.org/marketplace/addons/i-belong-the-paid-membe... which also requires ecommerce to make it work.

Might be what you're looking for.