depends on what you want to send...while the standard notifications could do that, you probably need to create a group with single user and use that for your recipient list...or, if the user its enrolled in a course, you can use the “Send Email” option on the Enrolments tab to send a single personalized email.

1. On the enrolment tab, locate the user and check the box beside their username on the left
2. Then, on the bottom right, click Choose Action
3. Then Send Email
4. Compose your email and send it. You can use the “short codes” to grab data from the LMS and show it in your email if you like.
5.  

@lrnlab Thank you!