The Missouri Petition For Guardian and Conservator of Minor. PDF is a legal document used to apply for guardianship of a minor in the state of Missouri. This document is used to request that a court appoint a guardian and/or conservator for a minor who is unable to care for him/herself. The Petition outlines the legal rights of the minor, the proposed guardian/conservator, and the proposed care plan for the minor. There are three types of Missouri Petition For Guardian and Conservator of Minor. PDF: Petition for Appointment of Guardian and/or Conservator of Minor, Petition for Appointment of Guardian of Minor, and Petition for Appointment of Conservator of Minor. The Petition for Appointment of Guardian and/or Conservator of Minor is used to request both guardianship and conservatorship of a minor. The Petition for Appointment of Guardian of Minor is for requesting guardianship only. The Petition for Appointment of Conservator of Minor is for requesting conservatorship only.