History of personal injuries, workers' compensation claims, or multiple car accidents. Job history shows many jobs held for short periods of time. The alleged injury relates to an existing injury or health problem. They use addresses of friends, family, or post office boxes. No known permanent address and move frequently.
Family members know nothing about the claim or alleged accident.
Their version of the accident is not consistent, not believable. There are no witnesses to the accident, or witnesses to the accident conflict with their version. Failure to report the injury or accident in a timely manner. Facts regarding the accident are related differently in various medical reports, statements, etc. The Social Security Number provided does not belong to them.