You prove you don't reside on the EU, and they don't bill you the VAT.
(But I believe the KYC rules aren't only because of this.)
(But I believe the KYC rules aren't only because of this.)
I've run into this with a few different German businesses, I don't know if I'm right or they are, but it seems like they don't _have_ to charge me VAT. Which is underlined by the huge "import VAT" bill I'm dumped with when I have physical goods delivered to me in the UK.