Departments and faculty are no longer permitted to provide verification letters directly to current or former students. Instead, students may request a course description verification via the CMU Registrar's Office.
Resources
General Verification page:
https://www.cmu.edu/hub/registrar/student-records/verifications/index.html
Course Description Verification page
https://www.cmu.edu/hub/registrar/student-records/verifications/course.html
FAQ page:
https://www.cmu.edu/hub/registrar/student-records/verifications/faqs.html
Verification form:
https://www.cmu.edu/hub/docs/verif-request.pdf