The California Guardianship Investigation Letter is a document requested by the court to obtain detailed information about a proposed guardian. It is used in California to ensure that a proposed guardian is suitable to take on the legal responsibility for a minor or an adult who is not able to make decisions for themselves due to either physical or mental incapacity. There are two types of California Guardianship Investigation Letters: the Minor Guardianship Investigation Letter and the Adult Guardianship Investigation Letter. The Minor Guardianship Investigation Letter is used to assess the suitability of a proposed guardian to take responsibility for a minor. It is typically requested by the court when a minor is involved in a guardianship case. The Adult Guardianship Investigation Letter is used to assess the suitability of a proposed guardian to take responsibility for an adult. It is typically requested by the court when an adult is involved in a guardianship case. The California Guardianship Investigation Letters are prepared by the court and sent to the proposed guardian and other involved parties, such as family members and social workers. The letters contain questions about the guardian's background, experience, and qualifications. The guardian must respond to these questions and provide any relevant documents or other evidence to support their answers. The court will then use the responses to determine whether the proposed guardian is suitable to take on the guardianship duties.