Stop Human Trafficking of Unaccompanied Migrant Children Act of 2023

This bill requires thorough background checks - including fingerprint, sex offender registry, and child abuse history checks - for all sponsors and household members aged 18+ seeking to care for unaccompanied migrant children. It prohibits placing children with undocumented adults unless they are biological parents, legal guardians, or immediate relatives. The bill mandates unannounced home visits before release and at least five in-person visits in the first year (then quarterly), plus monthly reports to Congress on placements, sponsor vetting, and missing children. It also requires retroactive vetting of all sponsors since January 2021 to ensure compliance with these safety measures.