Why is OK to board needed?

Related questions

1. What is OK to board in Dubai visa?
2. Does Indigo require OK to board?
3. Is OK to board required for Sri Lankan Airways?
4. How do I know if I have ECR or ECNR?
5. Does UAE require OK to board?
6. Is OK to board required for resident visa?
7. Do we need OK to board for FlyDubai?
8. Do we need OK to board for Indigo?
9. How do I know if my passport is ECR or ECNR?
10. Is OK to board mandatory?

Tags

1. #board
2. #flight
3. #respective
4. #return
5. #submit
6. #approved
7. #along
8. #directly
9. #required
10. #applying
11. #issue
12. #documents
13. #tickets
14. #airline
15. #rectify