It would not be a motion but rather, this requires you to file a small claims lawsuit against the former landlord.
The former landlord may be required to pay the former tenant damages equal to the value of the tenant's possessions, plus up to $250 as a penalty.
See Civil Code section 1965 (e)(1) and (e)(2).
Frank W. Chen has been licensed to practice law in California since 1988. The information presented here is general in nature and is not intended, nor should be construed, as legal advice for a particular case. This posting does not create any attorney-client relationship with the author. For specific advice about your particular situation, consult with your own attorney.