Amazon, like eBay and Rakuten and others, is an open marketplace, and such it has more risks since literally anyone can sell items on their website. Unlike closed marketplaces where the retailer is the only one offering an item. I’ve been saying for many years that Amazon and eBay have not done enough to help consumers make informed decisions. Partly perhaps because it’s very hard to measure sales that don’t happen versus sales that actually happen. So if something cannot be measured, it can often be prioritized much lower than tangible.
Regardless, to cut a long story short, Amazon has began tagging “International Versions” of products. Here is an example of the Nikon Coolpix L340 and another example of a bundled kit of the same item. An annotated screenshot shot of the tag is right below:
This is definitely a step in the right direction, however, one should not make additional assumptions. This does not mean that items without the tag are all USA warranty items. It only means that items with the tag are International Versions. On the main USA-version page of an item, you can still have a mix of new, imported, refurbished and used by Amazon itself, featured sellers, and everybody else on the internet with an Amazon seller account. Amazon itself is an authorized dealers for almost all the items they sell. And there is a number of well-known third-party sellers there that are authorized dealers (Adorama, Huppins/OneCall, etc). So you still have to pay attention to the actual seller, and if it’s not a familiar or well-known seller, it is very prudent to still research them to your satisfaction.
Another distinction that may not be obvious to those who rarely shop at Amazon is that “fulfilled by Amazon” is eligible for Prime shipping and you get Amazon Customer Support, however, for warranty purposes, it does not “transfer” authorized dealer status. “Fulfilled by Amazon” simply means that a seller sent a box of things to an Amazon Warehouse and when you buy those items, they get processed from the Amazon Warehouse, instead of the seller’s facilities. A manufacturer can still decline warranty service if that particular seller is not authorized.
More commentary on these matters by S.W. Anderson in the Comments section of a previous imported item post.