California Code, Probate Code - PROB § 2625

Any sale or purchase of property or other transaction not previously authorized, approved, or confirmed by the court is subject to review by the court upon the next succeeding account of the guardian or conservator occurring after the transaction. Upon such account and review, the court may hold the guardian or conservator liable for any violation of duties in connection with the sale, purchase, or other transaction. Nothing in this section shall be construed to affect the validity of any sale or purchase or other transaction.