If they feel your claim is not legitimate then yes they can. This is the same in any country or state. If you feel they are wrong to do so then it is up to you to approach the relevant arbitrator (the FOS in the United Kingdom but this will be different I suppose in the US). Your other option is to sue, as if your claim is legitimate then they are in breach of contract.
It is up to the driver to subit the auto accident claim. You should submit the claim as soon as possible after the accident.
One would or could go to various places. These places include the DMV, or the auto insurance company which distributes their auto insurance to claim an auto accident personal injury insurance claim.
That is going to depend on the state.
If hit a tree and damaged my auto, how long do I have to report it to my insurance company?
Yes it should, but the auto insurance company may have to pay the medical insurance after the claim is paid.
It really depends on your insurance company and how they want you to file a claim. Most companies have you call the claim in on the phone. Call your insurance agent to ask.
how long does it take for an insurance company to pay a loss wage claim
not legally, if they find out your address is wrong the insurance company can deny a claim
You can change your auto insurance at any time. It is up to the company to decide whether or not to accept your claim.
You do not have to reimburse your insurance company if the accident is the fault of the other driver and the claim is made on their insurance. If the accident is the fault of the other driver and their insurance does not cover everything and you make a claim on your insurance for reimbursement, your insurance will subrogate (collect back) from the other company.
The number of points have nothing to do with an insurance claim. If you are asking about a company refusing to give you auto insurance, it depends on your state and the individual insurance company. For example I have received reports of one company refusing to renew any driver with a 20mph over the limit ticket.
Once you submit an auto insurance claim can your provider deny it?