BYT20 v Minister for Home Affairs

The applicant, BYT20, sought judicial review of a decision by a delegate of the Minister for Home Affairs to refuse to revoke the cancellation of the applicant's visa. The applicant had initially been recognised as a refugee from Afghanistan, but was subsequently found to be an imposter from Pakistan. The matter came before Judge Driver in the Federal Circuit and Family Court of Australia.

The court was required to consider several grounds of review, including whether the delegate failed to comply with section 129 of the *Migration Act 1958* (Cth), whether the applicant was denied procedural fairness, whether the decision was unreasonable, and whether the decision was affected by an apprehension of bias.

Judge Driver found that jurisdictional error had been established. The reasoning for this finding is not detailed in the provided text, but the outcome indicates that the delegate's decision was vitiated by a legal error.

The Court ordered that a writ of certiorari issue to quash the delegate's decision of 3 April 2019. Furthermore, a writ of mandamus was ordered, directing the Minister to redetermine according to law whether the cancellation of the applicant's visa should be revoked.