I assume you are in california.
(l) The bad faith claim or retention by a landlord or the landlord’s successors in interest of the security or any portion thereof in violation of this section, or the bad faith demand of replacement security in violation of subdivision (j), may subject the landlord or the landlord’s successors in interest to statutory damages of up to twice the amount of the security, in addition to actual damages. The court may award damages for bad faith whenever the facts warrant that award, regardless of whether the injured party has specifically requested relief. In an action under this section, the landlord or the landlord’s successors in interest shall have the burden of proof as to the reasonableness of the amounts claimed or the authority pursuant to this section to demand additional security deposits.
https://leginfo.legislature.ca.gov/faces/codes_displaySection.xhtml?lawCode=CIV§ionNum=1950.5