To mark the difference plainly: we do not use a power of attorney in that form here. Representation is either direct or indirect, and where it is indirect the representative becomes jointly liable for the customs debt.
That liability is precisely why the verification is not optional. A representative who accepts an appointment without establishing who the principal actually is has taken on a debt on behalf of a party they cannot identify.
Your standard does not read as strict to me. It reads as someone who has understood what they are signing. And the difficulty you describe, an inexperienced importer who cannot see why any of it matters, is the same on both sides of the Atlantic.
Under EU rules on indirect representation, the representative carries joint and several liability for the customs debt itself. US power of attorney law differs: the importer of record stays strictly liable regardless, and a POA never shifts that debt onto the broker. So the rigor here rests on the broker's own conduct exposure, not a shared debt. I do not know how CBP weighs broker negligence past that.
