Hi, a small run manufacturer that I used to work for, had to have a product CE certified.
The device which included a custom made taped 10Kw 240Vac transformer, Microchip embedded control board and array of power Thyristor packs was sent to a lab that specialised in providing all the info needed and testing for CE.
The unit came back in the same box that it was sent in but;
The toroidal tapped transformer had been CUT into two pieces, winding removed. (impressive cut)
PCB cut in two.
All nuts and bolts had their surfaces ground off to check base material.
Anything that we could not provide already certified CE documentation had literally been physically dissected using any force necessary to see its components.
It got CE, but they demolished a unit to get to all the parameters needed.
PS Wish I had a picture of the toroid cut in half, scary with copper wire frayed.