Multiple citizenship is a status in which a person is concurrently regarded as a citizen under the laws of more than one state.
Some countries consider multiple citizenship undesirable and take measures to prevent it. This may take the following forms:
Automatic loss of citizenship if another citizenship is acquired voluntarily (e.g., China, Czech Republic, Denmark, India, Indonesia, South Korea, Kazakhastan, Malaysia, Nepal, Norway.)
Possible (but not automatic) loss of citizenship if another citizenship is acquired voluntarily (e.g Singapore, South Africa).
Possible (but not automatic) loss of citizenship if people with multiple citizenships do not renounce their other citizenships after reaching the age of majority or within a certain period of time after obtaining multiple citizenships (e.g. Japan)
Criminal penalties for exercising another citizenship (e.g.,, Saudi Arabia.)
No one should be allowed to become MNA, MPA, Governor, Chief Minister, Minister, President or Prime Minister of Pakistan who holds dual nationality.