Canadian immigration law forbids a person to visit or immigrate with the worst criminal record, has severe health problems, financial issues, and falsification of previous immigration applications. The person who is found involved in any of the above credentials will become inadmissible to the Canadian immigration authorities. 

Litigations on the other hand sectioned to two different faces; incomplete paperwork/missing documents which might also be the fault of the visa officer and if this is the case you do not have to pay the fee for your application or it can be from the applicant himself in which he is obliged to repay the application visa charges.

The setbacks can happen, and there is nothing to shock about especially when it comes to visa refusals and inadmissibility because there are some officially authorized ways to defeat the visa litigations unless your refusals are not linked with any criminal activity or falsifications. In case of any default from the applicant, it won’t be doable or permissible in any way to get it done.