Dahua definitely does not want random people illicitly relabeling their equipment.
This statement may be true in theory, but what would you have to do exactly to make it illicit?
Jon is showing programs where virtually any 'random' dealer of any size can have their Dahua product rebranded with their own logo automatically by multiple OEMs. Even assuming the OEMs are authorized by Dahua to do so, it hardly seems like a tightly controlled sales initiative.
More than that is the fact that, as also pointed out by Jon, there is a tool on the public Dahua website, with step by step instructions on how to change the logo/images shown on boot and video loss of the DVR/NVR. Moreover, there are literally hundreds of posts on their support forum from seemingly unidentified people asking how to rebrand/relogo the machines. They recieve the link to the tool no questions about their identity or product origin seemingly asked.
So to my original example of ordering product, from an Amazon merchant shipping in the U.S. (HD Security Store), who would I ask for permission? Should I ask if they are an authorized rebrander? Should I not use the public tool?
What exactly is Dahua's policy, I can't find it. Hik is stated clearly, going so far as to list specific merchants.
I do think that Dahua does not want Dahua branded merchandise to end up on store shelves in the U.S., because they don't want the U.S. OEM's to think that Dahua is selling around them, but besides that...