Theory:

Loss of Indian Citizenship:

Part II of the Constitution of India (Article 5-11) prescribes three ways of losing citizenship.
 
Renunciation: (is a voluntary act) when a person after acquiring the citizenship of another country, gives up his/her Indian citizenship.
 
Termination: (takes place by operation of law) When an Indian citizen voluntarily acquires the citizenship of another country, he/she automatically ceases to be an Indian citizen.
 
Deprivation: (is a compulsory termination) The citizenship is deprived based on the order of the Government of India in cases involving acquisition of Indian citizenship by fraud, false representation or being disloyal to the Constitution.
 
Nationality and citizenship
Nationality is the status of belonging to a particular nation by origin, birth; basically it is an ethnic and racial concept. The nationality of a person cannot be changed.
  
Citizenship is granted to an individual by the country's government when he/she complies with the legal formalities. Citizenship can be changed.
Overseas Citizenship of India:
  
Non - Resident Indian
An Indian citizen who is residing outside India and holds an Indian passport.
 
Person of Indian Origin
A person whose any ancestors was an Indian nationals and who is presently holding another country's citizenship.(other than Pakistan, Bangladesh, Sri Lanka, Bhutan, Afghanistan. China and Nepal). The PIO scheme was cancelled w.e.f. \(09-01-2015\)
 
Overseas Citizen of India Card Holder
It is an immigration status permitting a foreign citizen of Indian origin to live and work in the Republic of India indefinitely. (Except the citizen of Pakistan and Bangladesh). There are no voting rights for an OCI cardholder.
 
 
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OCI card
  
Overseas Indians’ Day
Pravasi Bharatiya Divas (PBD), Sponsored by the Ministry of External Affairs of Government of India, is celebrated once in every two years to “mark the contributions of Overseas Indian Community in the development of India”. The day commemorates the arrival of Mahatma Gandhi in India from South Africa.
 
Important!
Qualities of a good citizen
■ Loyalty to the Constitution
■ Obeys laws
■ Contributes to society and community and performs a civic duty
■ Respects diversity