If you search the forums, you will see that this has been discussed previously.
I do insurance letters for clients. I charge them anything up to £45.00 for the letter (which is added to the insurance claim).
One thing to bear in mind though, is to keep a copy of all reports you do. Many insurance companies, will contact you, to ensure you have done the report, and to finalise a few details. Ie you could say the laptop was indicative of being dropped (accidental damage), they would want to know a few more details. ie was there any extra damage shown etc.
Take pics of all the damage you see, and keep them in a folder with the insurance letter. That way you can send the pics to the insurance co if required. (this has happened to me once).
The insurance co, are not in any way attempting to catch you out, but as im sure your aware, a lot of people try and claim for things which havent happened... read into that what you want
I once had a guy who had a pci tv tuner card in a laptop, which was damaged. The laptop that is. The card itself was working fine. (this is when the tv card first came out, and cost a sml fortune).
Wrote the insurance report out, for the laptop. Client contacted the insurance co, told them as well as the laptop being broke, the tv card was damaged at the same time, and wanted that replacing also.
ins co contacted me, asked about the laptop, which was all the usual questions, then asked about the tv card. Told them, the card is fully functional, and does not require replacing.
the ins co, wrote off the laptop, and gave him the money for it, but didnt do anything for the tv card. Client was fuming!, he had a few nasty words to say to me, water off a ducks back.
In the end, I lost the client, (but that was ok with me), as I gained the ins co as a client..
Now, im registered with this ins co, as a company who tells their clients to go to x, y, or z, to have their items looked at for a repair. win / win situation for me on that respect.