What are the reasons why a passport is blacklisted by a country?

Generally, people with the following suspicions will be blacklisted by a country:

1. Suspected of being an economic espionage;

2. Suspected of being a spy. Military espionage;

3. Intent to subvert the regime of the host country;

4. Funding/assisting terrorist organizations;

5. Those who have committed serious criminal acts in the local area .

Once you are blacklisted by a country, you will not be able to obtain a visa from that country and will not be able to enter again.