I see what you are saying. The thing is, the product was not damaged during shipping. I did not notice any damage at all on any of the boxes when I received the item, and I still have the boxes and still see no damage.
To me, it seems like the product was shipped broken, or it left the factory broken (perhaps they tightened the fan housing too tightly.)
Well that is possible, but really irrelevant. UPS only wants to inspect the packaging to see if whoever you bought it from packaged it well enough to prevent damage. If they failed to package it properly, UPS will say it was the shippers fault, if it was packaged reasonably well, UPS will OK the claim. You do not have to prove it was damaged during shipping, it is presumed it was damaged during shipping if it was adequately packaged.
For example, I have sold somewhere around 150 of the JBJ nano cube aquariums. I have had two that arrived to my customers damaged. Personaly, I suspect at least one was damaged by the trucker when it was delivered to ME, not when I had it sent by UPS, but I have no way of knowing for sure. UPS inspected the box, determined I packed it correctly, and paid me the claim. They very rarely reject a claim.
The post office is a different story. They seem to rarely PAY claims. Another reason why I do not like to use them.
Whoever you are dealing with probably has not had this happen very often and is unsure of the proceedures, I know I was the first time it happened to me. It is a huge pain for me, for the customer, and everyone involved. Thank God it doesn't happen very often. I have no experience with DHL at all, and have no idea how they handle things, but just save all the packaging, let them see it, and show or explain the damage if they ask. Most likely there will not be any problem. You can always call JBJ yourself and see what they will do.