CCP 4263     

Art. 4263.  Contracts between tutor and minor

A tutor cannot in his personal capacity or as representative for any other person make any contracts with the minor.  He cannot acquire any property of the minor, or interest therein, personally or by means of a third person, except as otherwise provided by law.

Contracts prohibited by this article shall be null, and the tutor shall be liable to the minor for damages resulting therefrom.