Find the contact information of your school's provost's office. A provost is the senior academic academic officer at a higher education institution. If your institution does not have a provost, the Vice President of Academics or Academic Affairs should have the information you need.
Contact your school's provost's office either by phone or email. Ask the provost's office, or vice president's office, for the name of the accrediting agency for the school or department or program you are interested in. For example, the school may be accreditation as a whole by a regional or national accrediting agency, while its accounting department also maintains accreditation from a specialized body.
Visit the website of the accrediting agencies you received from school officials to verify the information.