Because the new owner signed a document releasing liability does not mean the transport company is not liable, it only means he accepts the vehicle in good condition, upon discovering immediately afterwards the issue the signed agreement will mean very little. Take them to small claims court. Because they have a signed document does not mean they didn't breach the contract or terms of the delivery. I would press this into small claims and force them to defend, force the driver to defend, force the headache. They will concede. IMHO.
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