May we reiterate that pursuant to Examination Announcement No. 02, s. 2022, the Civil Service Commission neither holds any review class nor publishes or distributes any review material for any Civil Service Examination. Further, the CSC does not accredit and has not accredited any individual, group, or review center for the purpose of producing/publishing and/or distributing/marketing/selling any review material, and of offering and holding review sessions/classes to prospective civil service examinees. Availing of any such product/service shall be one's personal option and accountability.

See the full text of the Exam Announcement through this link: http://www.csc.gov.ph/2014-02-21-08-28-23/pdf-files/category/1846-examadvisoryno1s2022.html