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Petition for Adult Adoption

A Petition for Adult Adoption is a formal legal pleading submitted to a court of competent jurisdiction to request the establishment of a permanent legal parent-child relationship between two consenting adults.

Updated Aug 31, 2026
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Case Posture

Most adult adoption petitions start a new adoption case. Choose existing case only if a court has already assigned a case, cause, or docket number for this adoption matter.

Use the exact number shown on the court's docket or prior filings.

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Table of Contents

What is a Petition for Adult Adoption?

A Petition for Adult Adoption is a formal legal document filed in a state court to establish a legal parent-child relationship between two consenting adults. This legal process permanently severs the legal ties between the adopted adult and their biological parents, replacing them with a new legal relationship with the adoptive parent or parents. Once approved by a judge, the court issues an adoption decree, granting the parties the same legal rights, privileges, and responsibilities as a biological parent-child relationship, including inheritance rights. The document is filed in probate, family, or surrogate courts depending on the jurisdiction.

Common Purposes of Adult Adoption

Adult adoptions serve several distinct legal and personal purposes. While child adoptions focus on custody and welfare, adult adoptions focus on formalizing existing family structures and securing legal rights:

  • Stepparent Formalization - Legalizing a long-standing relationship between a stepparent and an adult stepchild who was not adopted during minority.
  • Foster Care Transition - Formalizing the bond between former foster parents and an adult foster child who has aged out of the state foster system.
  • Inheritance and Estate Planning - Establishing a legal heir to simplify inheritance and ensure estate planning wishes are legally protected.
  • Caregiver Relationships - Solidifying the legal relationship between an elderly adult and a younger adult caregiver who acts as a family member.

Required Elements of the Petition

Checklist of essential elements required for filing an adult adoption petition.
A checklist detailing the primary information and consent forms required for filing a standard adult adoption petition.

State court forms, such as those provided by the Minnesota Judicial Branch and the Colorado Judicial Branch, require specific factual disclosures:

  • Petitioner Information - Full legal name, residential address, age, and relationship to the proposed adoptee.
  • Adoptee Information - Full legal name, date of birth, place of birth, and current residential address.
  • Marital Status - The marital status of both the petitioner and the adoptee, including the names of spouses.
  • Statement of Intent - A formal declaration of the desire to establish a parent-child relationship and the reasons for the adoption.
  • Name Change Request - An optional request to legally change the surname of the adopted adult to match the adoptive family name.

Consent and Signature Requirements

Unlike child adoptions, which involve parental termination proceedings, adult adoptions rely heavily on the mutual consent of the parties involved. State procedures outline the necessary consents:

  • Adoptee Consent - The adult being adopted must provide written consent to the adoption, as required by all state court systems including Utah and New York.
  • Petitioner Consent - The adopting parent must sign the petition under oath, affirming their voluntary participation.
  • Spousal Consent - Many states require the spouse of the petitioner or the spouse of the adoptee to consent to the adoption (Utah State Courts).
  • Biological Parent Consent - Most jurisdictions do not require the consent or notification of the adoptee's biological parents, as the adoptee is a legal adult.

State Laws and Requirements

State-specific regulations govern the filing procedures, eligibility criteria, and judicial review of these petitions:

  • New York Adoption Petitions - Allows adult adoptions through the family or surrogate's court system (New York State Unified Court System Form).
  • Minnesota Adoption Filings - Mandates the use of a standardized form disclosing residency and family history (Minnesota Judicial Branch Form ADO702).
  • Utah Age Gap Mandate - Requires the adopting parent to be at least ten years older than the adult being adopted (Utah State Courts Self-Help).
  • Colorado Court Procedures - Outlines the petition requirements and the subsequent issuance of a formal adoption decree (Colorado Judicial Branch Self-Help).
  • Ohio Probate Filings - Directs petitioners to file adoption forms in the probate court of their county of residence (Supreme Court of Ohio Probate Form 19.0).

Types of Adult Adoption Petitions

Comparison graphic showing the different types of adult adoption petitions.
A visual breakdown of the common types of adult adoption petitions filed in state courts.

There are several types of adult adoption petitions filed in United States courts:

  • Stepparent Adult Adoption - A petition filed by a stepparent to legally adopt an adult stepchild, which is the most common form of adult adoption.
  • Foster Parent Adult Adoption - A petition filed by former foster parents to formalize their legal relationship with an adult who formerly lived in their home.
  • Relative Adult Adoption - A petition filed by an aunt, uncle, grandparent, or other relative to legally adopt an adult family member.
  • Non-Relative Adult Adoption - A petition filed by unrelated adults to establish a legal parent-child relationship based on mutual affection and family-like bonds.

Frequently Asked Questions

In most states, biological parents do not need to be notified or provide consent for an adult adoption. Because the adoptee is a legal adult, they possess the sole authority to consent, though the process permanently severs biological legal ties.
Yes, an adult adoption petition can include a request to legally change the adoptee's surname. If the court approves the petition, the adoption decree will authorize the name change.
Some states require a specific age difference between the petitioner and the adoptee. For example, Utah law requires the adopting adult to be at least ten years older than the adoptee.
Most jurisdictions require the spouse of the petitioner to consent to the adoption. This ensures that both spouses agree to the creation of a new legal parent-child relationship within the household.
The petition is typically filed in the county court where either the petitioner or the adoptee resides. Depending on the state, this may be the probate court, family court, or surrogate's court.

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