How To Write A Letter To Override Course . If the request has been approved, state any conditions, limitations, or further arrangements to. This is a permission, whether it's formally called that or not. One Education Enrollment letter Final One Education from www.oneeducation.org.uk First, override is a noun, not a verb. The right phrase might even improve your relationship. You want an override slip/chop/form from the professor to allow you to take the course.