and I was not directing it at the insurance company to look it up (however they may). It is up to the tech to determine.
Before deciding if you will write the letter, it should be decided how much it will cost and determine the unit's value.
It would also depend on the insurance/warranty as well. If they do not have accidental damage coverage (such as dropping), and it was known to have been dropped by the tech, the letter should not be written, or the accident should be included with it to make sure that everything is on the up and up