A third party is anyone other than your employer whose conduct contributed to the accident. Depending on the facts, that could be a general contractor, a subcontractor, a property owner or manager, an equipment owner or rental company, a machinery manufacturer, a maintenance or repair contractor, a delivery company, a commercial driver, an outside vendor, or another company working at the site.
The responsible company is often not obvious after an accident. Contracts, equipment records, witness statements, and site-control information can help identify who played what role.
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