Like adults, unaccompanied minors are required to contact the prefecture of their place of residence to initiate the process of applying for asylum in France. However, as a minor, you cannot initiate any legal or administrative proceedings without a legal representative.
Consequently, if you go to the prefecture without a legal representative, the prefecture staff will inform the public prosecutor so that an ad hoc administrator can be appointed. Only the legal representative can pick up an asylum application form from the prefecture. It is also the responsibility of the legal representative to carry out all the administrative procedures pertaining to you. If you have been granted State guardianship by a judge, the child welfare services (Aide Sociale à l'Enfance - ASE) in your department of residence will take care of all these formalities.
The asylum application file must be completed in French and signed by your legal representative before being sent to Ofpra by post.
If the file is complete, it is then registered and a letter of introduction is sent to you and your legal representative. You will then be summoned along with your legal representative for an interview at Ofpra.
For more information, you can consult the asylum guide for unaccompanied minors in France, published by Ofpra with the support of the Asylum, Migration and Integration Fund (Fonds Asile, Migration et Intégration - FAMI).