The requirement for including the legal guardian's name in the family details area of a passport application form may vary depending on the specific country's regulations and the individual circumstances. Generally, if both parents' names are provided in the application form and they have legal custody of the applicant, it is not necessary to include the legal guardian's name separately.
However, in situations where there is a legal guardian appointed by the court or any other legal arrangement (such as in cases of divorce, separation, or adoption), it might be required to provide the legal guardian's name in addition to the parents' names.
To ensure accuracy and compliance with the passport application requirements of your specific country, it is essential to refer to the official instructions and guidelines provided by the passport issuing authority. This information can typically be found on the official website of the passport office or by contacting them directly. Each country may have its own unique requirements and procedures for passport applications, so it's essential to follow their guidelines to avoid any delays or issues with your application.