What an MEA Apostille in India is
The Apostille is a standard certificate created by the 1961 Hague Convention. Instead of every foreign embassy checking every Indian document, the country that issued the document certifies it once, and all other member countries accept that certificate.
In India that certificate is issued by the Ministry of External Affairs through its Consular, Passport and Visa (CPV) Division. It is printed as a square sticker on the back of the document, with a unique number, the date and the name of the officer whose signature it confirms.
Two points matter in practice. The MEA does not check what the document says; it confirms the signature of the officer who authenticated it before. And since July 2012 the MEA does not take documents from individuals at its counter in New Delhi. Documents reach it through authorised outsourced centres, which is where an agency like ours handles the file for you.