Upvote:1
The "issuing authority" is the government agency or department that issued the passport. For example, in the United States, passports are issued by the Department of State.
A brief Google search reveals that Indian passports are issued by the Ministry of External Affairs.
Upvote:4
The issuing authority on Indian passport is mentioned below the name of the person whose signature are present.
For passports issued in India, it is something like, "Regional Passport Office, Delhi", "Regional Passport Office, Kolkata", etc.
For passports issued outside India, it would be something like "Consulate General of India, San Francisco", "High Commission of India, London", etc.