To, This is to certify that ...[ employee title ] ... [ employee name ] was working at ...[ organization name ] as "data entry operator" from ... [ joining date ] to ...[ last working date ]. During this period, his services were found to be satisfactory in carrying out the job duties. His responsibilities were to: 1) Operate keyboard or other data entry device to enter data into computer or onto magnetic tape or disk for subsequent entry 2) Enter alphabetic, numeric, or symbolic data from source documents into computer, using data entry device, like keyboard or optical scanner and following format displayed on screen 3) Compare data entered with source documents, or re-enters data in verification format on screen to detect errors 4) Delete incorrectly entered data, and re-enters correct data 5) May compile, sort, and verify accuracy of data to be entered 6) May keep record of work completed. We wish him/her all the best in his future