1. No and yes.
No - The Department rarely exercises the prosecution authority of improper reporting unless the right of the injured worker has been harmed or the reports intend to misled the Department. See this for the actual enforcement data:
http://gia.info.gov.hk/general/201410/15/P201410150420_0420_135798.pdf
Yes - the Department can initiate an investigation for possible workplace safety violations.
2. Not in this case.
a. The injured worker seek medical treatment immediately, which has generated medical evidence. To insurance companies, they simply concerns delay in reporting may harm their own investigation to determine liability. But if the injury is proper documented, it can't deny based on clerical errors.
b. No, if the insurance company determines it is not work related.
3. Not necessary. When the company denies the claim, it will provide a reason. That reason will give clues about the version of the incident in the view of the company.
No - the only legal liability is always associated with money.
4. None (0%). In most of the case, patients suffering from bone fractures can fully recover with adequate bed rest and physical therapy.
Not all compensation cases associate with loss of earning ability.