While this is certainly true if you order from the US store to the EU. The EU area now has their own Bungie store so as long as they're in the EU they won't be charged customs.
But I'm also guessing they are using the US store and living in the US 😀
English
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correct the UK is no longer apart of the EU and the UK is still bound by customs taxation charges
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But those won't apply until 1st January 2021, until then people can buy from the EU store in the UK and pay no charges. But either way we're going off on a tangent as we're not sure where the OP is from and I'm guessing the US either way so our conversation won't apply to them 😀