What does the employer need to do if you are not sure if an injury happened at work?

Depending on the policies of the company one is working for, and the laws of the state the person is in, an employer generally has 48 hours to submit a Worker's Comp claim, to be covered by the company's insurance. If a person thinks that an injury they suffered is likely to have been work-related, and that injury is significant enough that the medical expenses would cause a financial problem should they handle it themselves, then they should discuss it with their immediate supervisor as soon as possible. For instance: I myself had injured my hand at work one time. It didn't hurt that bad, and I thought I could "walk it off". However, the next night at home, my finger started tingling inexplicably. Knowing this was not a good thing, I called up my boss and, knowing of the incident, he said he still had time to file it as Worker's Comp. It was a good thing he did, since it had turned out I'd chipped a bone in my knuckle, and needed to have my hand kept in a splint for awhile with regular doctor's visits to check up. At the time, I had no insurance and would not have been able to handle the expense myself. - Iszi