QUESTION
               Whether M~ (Claimant) is entitled to child’s insurance benefits on the earnings record
                  of her stepfather, J~ (NH), who adopted Claimant in Arizona when she was an adult.
               
               SHORT ANSWER
               Yes, Claimant is entitled to child’s insurance benefits on NH’s earnings record because
                  NH’s adoption of Claimant was valid under Arizona law. Additionally, although Claimant
                  was over 18 years old when she applied for child’s insurance benefits, she was unmarried,
                  had a disability that began before age 22 and, as NH’s legally adopted child, was
                  deemed dependent on NH at the time of application.
               
               SUMMARY OF EVIDENCE
               Claimant was born on November XX, 1972. According to information provided by the T~,
                  Arizona Field Office (FO XXX908), she receives Disability Insurance Benefits (DIB)
                  and Supplemental Security Income (SSI) on her own earnings record, with an established
                  disability onset date of May 1, 1991. Her mother, A~, acts as Claimant’s representative
                  payee.
               
               Claimant’s birth certificate identifies her parents as A~ and G~. A~ reported that
                  she married NH on January XX, 1990. She stated they divorced in approximately June
                  of 2006 but remarried on November XX, 2009. She further stated that she and NH did
                  not live separately after their 2006 divorce and instead continued to live together
                  with Claimant as a single family unit through their 2009 remarriage.
               
               On June XX, 2005, when Claimant was 32 years old, an Arizona State court issued an
                  Order of Adoption establishing a parent-child relationship between Claimant and NH.
                  On March XX, 2017, NH filed for retirement insurance benefits (RIB). The agency granted
                  NH’s RIB application with an entitlement month of March of 2017. On April XX, 2017,
                  Claimant filed an application for child’s insurance benefits on NH’s earnings record.
                  If granted, the T~, Arizona Field Office indicated Claimant’s month of entitlement
                  would be March 2017.
               
               ANALYSIS
               Federal Law
               Under the Social Security Act (Act), an applicant may be eligible for child’s insurance
                  benefits on the earnings record of an insured individual if the applicant is the insured
                  individual’s “child,” as defined in section 216(e) of the Act. Social Security Act
                  § 202(d)(1); 20 C.F.R. § 404.350. Section 216(e)(1) of the Act defines “child” as
                  “the child or legally adopted child of an individual.” Section 216(e)(1) of the Act;
                  see also 20 C.F.R. § 404.356 (“You may be eligible for benefits as the insured’s child if
                  you were legally adopted by the insured”). For purposes of adopted children, the agency
                  applies the adoption laws of the State where the adoption took place. 20 C.F.R. §
                  404.356; Program Operations Manual System (POMS) GN 00306.135.
               
               In addition to applying for benefits, the applicant must establish that she is: (1)
                  the insured individual’s child; (2) unmarried; (3) under the age of 18 or, if older
                  than age 18, have a disability that began prior to age 22 or qualify as a full-time
                  student; and (4) dependent on the insured individual at the time the application is
                  filed. See Social Security Act § 202(d)(1)(C)(i); 20 C.F.R. § 404.350; POMS GN 00306.001.A. A legally adopted child is considered dependent on the insured individual if adopted
                  prior to the insured individual’s entitlement to old age or disability benefits. 20
                  C.F.R. § 404.362(a); POMS GN 00306.136. The applicant is entitled to child’s insurance
                  benefits in the first month she meets the foregoing criteria. See Social Security Act § 202(d)(1); 20 C.F.R. § 404.352(a).
               
               Arizona Law
               Under Arizona law, an adult may adopt another adult who is either 18 to 21 years old
                  and consents to the adoption or is the adopting adult’s stepchild, niece, nephew,
                  cousin, or grandchild. Ariz. Rev. Stat. § 14-8101(A). Where consent is required, such
                  consent must be in writing. Ariz. Rev. Stat. § 14-8101(A). An Arizona State court
                  in the county in which either the adopting adult or the adoptee reside must approve
                  an agreement of adoption between the parties by issuing a judicial decree of adoption.
                  Ariz. Rev. Stat. § 14-8101(A).
               
               The agreement of adoption between the proposed adopting parent and adoptee must be
                  in writing and executed by the proposed adopting parent. Ariz. Rev. Stat. § 14-8101(B).
                  The agreement of adoption must state that the parties agree to assume toward each
                  other the legal relation of parent and child, with all attendant rights, duties, and
                  responsibilities. Ariz. Rev. Stat. § 14-8101(B). If the proposed adoptive parent and/or
                  adoptee are legally married at the time of adoption, their spouses must consent to
                  the adoption if capable of giving such consent. Ariz. Rev. Stat. § 14-8101(C). Arizona
                  law does not require that the proposed adoptee’s natural parent(s) consent to the
                  adult adoption. Ariz. Rev. Stat. § 14-8101(C).
               
               The proposed adoptive parent must file a petition for adoption in an Arizona State
                  court in the county where the proposed adoptive parent or adoptee reside. Ariz. Rev.
                  Stat. § 14-8101(D). The petition must state: (1) the length and nature of the parties’
                  relationship; (2) the degree of kinship, if any; (3) the reason for the adoption,
                  together with a statement as to why the adoption is in the best interests of the parties
                  and the public; (4) the names and addresses of any living parents or adult children
                  of the proposed adoptee; and (5) whether the proposed adoptive parent and/or his or
                  her spouse has previously adopted other adult persons and, if so, the name of such
                  person(s) and the date and place of the adoption. Ariz. Rev. Stat. §§ 14-8101(F)(1)–(5).
                  If the court determines the adoption is in the best interests of the parties and the
                  public, the court will approve the agreement of adoption and make a decree of adoption
                  declaring that the adoptee is the adoptive parent’s child. Ariz. Rev. Stat. § 14-8101(D).
               
               Legal Analysis
               On April XX18, 2005, NH filed a Petition for Adult Adoption (petition) in the Arizona
                  Superior Court, P~ima County. The court granted the petition in an Order of Adoption
                  dated June XX15, 2005 (order).[1] In its order, the court confirmed that all Arizona-state law requirements had been
                  met and found that: NH was a resident of P~ima county at the time he filed the petition;
                  According to the order, Claimant was a “special needs adult” who had been in her mother’s
                  custody since approximately August XX25, 1990; Claimant consented to and expressly
                  desired the adoption; NH was aware of his responsibilities and obligations to Claimant;
                  NH and his spouse had not previously adopted an adult; and the adoption was in the
                  best interests of the parties and the public. Accordingly, the court ordered, adjudged,
                  and decreed the existence of a parent-child relationship between NH and Claimant.
                  Based on the foregoing, NH’s adult adoption of Claimant appears to meet the criteria
                  of Arizona Revised Statute, section 14-8101, subsections (B) through (F).[2] Furthermore, the adoption met the requirements of subsection (A) because, although
                  Claimant was older than 22 years of age at the time of the adoption, NH was marred
                  to Claimant’s natural mother and thus, he was adopting her as a stepparent.
               
               Neither the 2006 divorce between NH and A~ nor their subsequent remarriage on November
                  XX, 2009 affected NH and Claimant’s parent-child relationship or Claimant’s eligibility
                  for child’s insurance benefits on NH’s earnings record. Under Arizona law, on entry
                  of the decree of adoption, the parent-child relationship and all legal rights, privileges,
                  and other legal consequences of a natural parent-child relationship exist thereafter
                  as though the child were born to the adoptive parent in lawful wedlock. Ariz. Rev.
                  Stat. § 8-117(A). Because NH and Claimant had already established a legal parent-child
                  relationship in June of 2005, NH and A~’s June 2006 divorce did not impact NH and
                  Claimant’s parent-child relationship.
               
               Having established that she is NH’s child under the Act, Claimant must meet the other
                  criteria for child’s insurance benefits. First, because NH legally adopted her, she
                  qualifies as NH’s child under the Act. See Social Security Act § 216(e)(1); 20 C.F.R. § 404.356. Second, Claimant was unmarried
                  when she filed her application for child’s benefits on NH’s earnings record. See 20 C.F.R. § 404.350(a)(4). Third, although Claimant was over age 18 when she filed
                  her application, her age does not render her ineligible because the agency previously
                  determined that she had a disability that began before age 22 when it granted her
                  DIB and SSI benefits with an onset date of March XX, 1991. See 20 C.F.R. § 404.350(a)(5). Fourth, as NH’s legally adopted child, Claimant is deemed
                  dependent on NH, because the adoption took place in 2005, prior to NH becoming entitled
                  for RIB in 2017. See 20 C.F.R. § 404.362(a) (“If you were legally adopted by the insured before he or
                  she became entitled to old-age or disability benefits, you are considered dependent
                  upon him or her.”); POMS GN 00306.136.
               
               CONCLUSION
               Claimant is entitled to child’s insurance benefits on NH’s record. Her adult adoption
                  was valid under Arizona law, she was unmarried, had a disability arising before age
                  22, and is dependent on NH because NH adopted her prior to his RIB entitlement date.