Guys I called CBSA they put me through a immigration officer she clearly told me my brother would be denied entry.
I am thinking to change his flight to a later date or rebook it so that he can come as my fathers dependent.
What u do u guys think ? How many days apart shall I book his tickets ?
You should only book his ticket when you know he can land. You will probably need to wait until your parents have their PR card in order for your father to be allowed to board. Only presenting a landing document may not be enough for the airline. You will have to check with the airline when it comes to what kind of proof they require to show that a parent has PR. Assume your brother is 21 or younger.