If the tenant that you allowed to store items on your property still has the items there, you need to serve him or her with a thirty (30) day notice of termination of the rental. If the tenant remains after the passage of the thirty (30) day time period, you will need to serve him or her with an unlawful detainer action seeking damages for the unpaid rental.If the tenant voluntarily moves out within the requested time period taking his or her items, but does not pay you, you most likely will have to file a small claims court action to get the money that you are owed. Hopefully you have a written agreement setting forth the terms of the rental with the tenant.