Hi Folks -
So just to be sure - the key with customs is to accurately declare the Country of Origin. That should almost always be listed as the country in which the product is made. That can get a bit sticky if a product is manufactured in multiple countries (i.e. you build a board in China but assemble the product with parts sourced in Switzerland). For most Tindie sellers, this may not be a problem. However for those folks with multiple origin-points, the US CBA (US Customs & Border Protection) provides details on their site for how products must declare the origin marking for these individual countries. See here. I would suggest doing some research on the requirement for the places you find you're shipping the most, to ensure you comply.
Because we're really just facilitating the transaction and not the distribution for the item, Tindie sellers will have to decide the requirements for their individual items. However my hope would be that in the future we can compile an FAQ for rules and regulations to try and smooth this process for the sellers!