An Application for Leave and Judicial Review to the Federal Court of Canada is a legal process that allows individuals to challenge a decision made by an immigration authority that has resulted in the refusal of their immigration application. When a person's immigration application, such as a visa or refugee claim, is denied, they may seek judicial review by applying for leave (permission) to the Federal Court. The court will then consider whether there are reasonable grounds to proceed with a judicial review. If leave is granted, the Federal Court will review the decision to determine if it was made lawfully, fairly, and in accordance with immigration laws and policies. This process provides a mechanism for individuals to seek legal remedies if they believe their immigration application was wrongly refused.

