It is always good practice to have a good unboxing video. If the TD and you cannot find an agreement, then you can always open a helpdesk ticket with RWI
That said, there is no risk that the TD plays foul. If the watch is stolen, it's during shipping, so not their fault. This is part of the risk you need to take.
If you want more peace of mind there is a couple of TD listed that ship from UK, but with a smaller catalog. I won't post their names here per respect to czt as it's their section.
personally I like CZT a lot.