No Objection Certificate or popularly abbreviated as NOC is a type of legal certificate issued by any agency, organization, institute or in certain cases, an individual, that does not object to the covenants of the certificate. This certification is a requirement at most of the government-based departments , private sector, etc.
A NOC may be from an employer, an employee, landlord or from a company, and the legal format of this certificate is brief, stating that there is no objection to doing certain work or appointing someone for employment. This document is popular in both private and government sectors and can relate to employment as well as at the time of leaving service.
NOC letter shows your previous job experience and behavior as well. This certificate is issued as per request of person according to his specific requirement. NOC shows no objection upon the particular person and purpose.