Advice Needed: Denied Boarding during Transit

[niz_fathi]

My father applied for a visitor visa to Canada in June 2022 from Muscat, Oman. He renewed his passport in Dec 2022 and raised a webform to amend the application with the new passport details. His visa got approved in Feb 2023 and he submitted his new passport. The counterfoil was generated in the new passport with the validity till 2032.
When he recently travelled to Canada from Muscat - Frankfurt - Montreal, he was denied boarding in Frankfurt during transit stating that the visa is invalid, and the visa and passport information do not match even when the counterfoil information matches with his current passport information. He is a frequent traveller and has already travelled using that passport. Later the airline authorities allowed him to board the flight the next day consulting immigration officers . When he scanned his passport at the port of entry (Montreal), he didn't have any issues.
Has anyone come across such a situation? I am not sure whom to contact to verify the information. Should I call IRCC and verify the passport number on the file (which could possibly be the old one)? Or is it an airline issue? I do not want him to face this issue when he travels to Canada the next time.
Any help is appreciated. Thanks!

 

[Sanataarti]

Hello! I am having the same issue. Do you know why the visa was denied?

 

[steaky]

Hello! I am having the same issue. Do you know why the visa was denied?

The visa wasn't denied. In fact, it got approved in Feb 2023 and valid til 2032.

 

[Sanataarti]

The visa wasn't denied. In fact, it got approved in Feb 2023 and valid til 2032.

Sorry my mistake. Do you know why their boarding was denied? My mom has a valid visitor visa but they didn’t let her board the plane yesterday!

 

[steaky]

Sorry my mistake. Do you know why their boarding was denied? My mom has a valid visitor visa but they didn’t let her board the plane yesterday!

There can be a number of reasons, such as:

1) In the OP's case: he was denied boarding in Frankfurt during transit stating that the visa is invalid, and the visa and passport information do not match even when the counterfoil information matches with his current passport information. He is a frequent traveller and has already travelled using that passport. Later the airline authorities allowed him to board the flight the next day consulting immigration officers . When he scanned his passport at the port of entry (Montreal), he didn't have any issues.

2) Overbooking

Airlines sold more than the number of seats available. As a result, unless there are passengers that voluntary give up their assigned seats and change to other flights, someone will be denied boarding or forced to give up their seats even after boarding.

 

[scylla]

Sorry my mistake. Do you know why their boarding was denied? My mom has a valid visitor visa but they didn’t let her board the plane yesterday!

Does she hold a TRV or super visa? Was she traveling on a return ticket? What was the reason given why she was denied. She must have been given a reason.