Cal. CIV § 5735

(a) An association may not voluntarily assign or pledge the association’s right to collect payments or assessments, or to enforce or foreclose a lien to a third party, except when the assignment or pledge is made to a financial institution or lender chartered or licensed under federal or state law, when acting within the scope of that charter or license, as security for a loan obtained by the association. (b) Nothing in subdivision (a) restricts the right or ability of an association to assign any unpaid obligations of a former member to a third party for purposes of collection.