Repeating my comment. That is not how this works.

Governments ask for something like a metal spectrometer analysis of components. They might even say each batch needs to be analyzed and we trust analysis from spectrometers manufactured and/or operated in US. Each condition raising the price for certificate/analysis even more.

Or directly from the post

> U.S. customs is demanding a Certificate of Analysis (which could cost thousands of dollars and to determine what exact amount of Aluminum, Copper and Steel are in the product), otherwise they assume the entire PCB consists of copper, aluminum, and steel, and charge a 100% tariff on the whole product.

I don't believe your claim that governments ask for something like a metal spectrometer analysis, especially since Digikey hasn't reported the same disruptions. There's no way Digikey did this for all 16.5 million parts.

In later comments on their blog they admitted they didn't even file the paperwork and left it up to the customer, who obviously wouldn't know how, causing the part to get stuck in customs.

It's a frustrating situation for them but there's no way CBP is making people break out lab equipment to import a PCB.

Do they have to do this each time they change the composition of the board? What about if they just move/change the layout of the copper traces?