But Admiral Patrick (sorry, I still don’t know how to link/tag users) wrote he has to scan and email the physical signature from the paper, so it is not really physical anymore? Maybe he has to send the physical paper by snail mail in addition to the email.
I don’t know how you ended up on a page for a Taiwanese marketplace and didn’t realise it.
But on the other hand the official customs page doesn’t have anything about animal products.