A person should stay away from this retraction, unless it is for a mitzvah: Yevamot 109a-b
Marriage of Minors
Yibbum [Levirate Marriage] and Minors
Who can perform miun
The miun process, and legal ramifications
Involvement of courts and testimony
Ketubah rights of a woman who performs miun
Food-support rights of a woman who performs miun
Rights to marital property, for a woman who performs miun