Always be precise. Never exaggerate anything.
If you communicate something that is in error, immediately notify the insurance company of your mistake in writing.
Avoid the use of harsh, demanding or angry language. No matter how frustrated you may become, do not make threats. This is counter-productive.
It is all right to send copies of thoughtful and articulate correspondence to the claim supervisor or claim manager of the company. However never send cc’s to VIPs such as members of congress, the White House, the President of the UN or other luminaries. This does not work.