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I am sorry to hear about this situation. If you say that the granddaughter was evicted, then she was either a tenant who had to pay but did not, or, a non-paying tenant (called a tenant at will/sufferance). Either way, the same rules apply for left over items left by tenants.
She cannot sue (or if she did, the suit would likely fail) for left over items provided that the landlord (i.e. you) follows the statutory requirements for storing/giving notice/getting rid of said items.
Per 59.18.310, 59.18.312, et seq, the landlord may store property remaining when a sheriff executes a writ of restitution unless the tenant objects to storage. If the tenant objects, the landlord may place the property on the nearest public property. If the landlord stores property valued at $50 or less, he must give the tenant notice that he intends to sell or dispose of it after seven days unless it is reclaimed. If the property is valued at over $50, the landlord must give the tenant notice that he intends to sell or dispose of it after 45 days unless it is reclaimed. The landlord must apply and sale proceeds to any outstanding debts the tenant owes the landlord, including rent and storage of the property. The tenant can claim any excess income from the sale for up to one year. After one year, the balance becomes the landlord's property.
Let me know if you need a sample notice.
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