However, CSC chairwoman Karina Constantino-David said three of the four erring employees have fled the country.
The four were identified as media productions specialist Antonio Agustin Jr., personnel specialist Elizabeth Tolosa and clerks Edmar Alfaro and Ferdinand Aganda.
The four allegedly adopted innovative schemes such as pencils with carved symbols representing answers to the multiple-choice CAT: slash, circle, triangle, square or pentagon if the correct answer is item 1, 2, 3, 4 or 5, respectively.
The group also used colors in special wristwatches to denote the right answers: red, blue, yellow, green and gray for items 1 to 5, respectively.
Elfren Meneses Jr., the NBIs Anti-Fraud and Computer Crimes Division chief, said the group charged different amounts based on the examinees age and the government agency to which he belonged.
For instance, an examinee aged 20 to 29 is charged P20,000 to P25,000, while someone nearing the retirement age had to pay P60,000 to P75,000.