NOC means ‘No Objection Certificate’ from your present employer when you apply for another job. The Government rule is that NOC is required just to apply for other Government jobs only. A government employee is governed by the Civil Service Conduct Rules. But, the Department which employs is duty bound to give No-Objection Certificate if one is applying for a post that is more remunerative or higher in position.
Citizens may apply for NOC for seeking Government Employment in a form which has several fields pre-filled, by uploading the required documents such as Appointment Letter, Affidavit, State Subject, Date of Birth Certificate.
If the new employer directs you to show the release order before joining and by that time, you have left the earlier organization the govt organisation will definitely demand it before allowing you to join.
Government cannot refuse to give no objection certificate (NOC) to an employee. You are required to submit NOC (No Objection Certificate) at the time of interview. If you are employed in Central or State Govt departments, Public Sector Undertakings (PSUs), Autonomous bodies and you are applying for a job in other Public Sector Undertaking (PSU) or government job you are needed to submit the NOC from your employer at the time of Interview.