2. Depends on your sponsor, but it is generally difficult to get a NOC, You can appeal to the ministry if you feel you have been treated unfairly.
3. There is often a 2 year ban on you obtaining another work visa, I'm not sure if this again depends on the sponsor.
4 Even if your residency has been cancelled, you can still get a visitor visa. It is easier if you are from one of the approved 33 countries that can purchase the visa on entering Qatar.
1. There is no such rule
2. Depends on your sponsor, but it is generally difficult to get a NOC, You can appeal to the ministry if you feel you have been treated unfairly.
3. There is often a 2 year ban on you obtaining another work visa, I'm not sure if this again depends on the sponsor.
4 Even if your residency has been cancelled, you can still get a visitor visa. It is easier if you are from one of the approved 33 countries that can purchase the visa on entering Qatar.