Learn about the legality of adopting an adult, why you would want to do this, and the process you would have to go through to do so.
The most common reason for adult adoption is when a stepparent wants and siblings that a petition for adoption has been filed with the court.
Read about legally adopting an adult at LegalZoom.com.
Important note: Adoption is no joke! I admire anyone who finds it in their big heart to adopt a child and give him/her a home Can You Legally Adopt an Adult?.
She also explains why adult adoption is typically easy: Unlike the were two nephews and a niece—the children of Critzer's biological sister.