There are at least two types of judgments that require permission of a judge in order for the loser to appeal: appeals by the state in criminal cases, and habeas corpus appeals.

In the habeas situation, the loser, whether the petitioner or the state, must get permission to appeal from the habeas  judge. If the judge denies permission, the statute makes clear that “an appeal may not be taken[.]” Nonetheless, in Simms v. Warden, 229 Conn. 178 (1994) (Simms I), the Supreme Court not only allowed appeals on the merits to proceed after a denial of permission to appeal, but also allowed a party to challenge the propriety of that denial in the same appeal.