Professional engineer seal

In North American jurisdictions, engineering is a licensed profession and the seal is its instrument of accountability. State and provincial law defines which documents must be sealed for permitting and construction, and the sealing engineer must have been in responsible charge — the work done by them or under their direct supervision. The seal does not certify perfection; it attaches a named, licensed, disciplinable professional to the standard of care.

The seal interacts with the review system rather than replacing it. Authorities in seal-based systems typically review less engineering substance than expertise-based systems do, precisely because responsibility already sits with the licensee — a structural difference worth understanding when projects cross between the two worlds.

The characteristic abuse has a name: plan stamping — sealing work the engineer did not actually supervise, as a paid formality. It is a licence-revoking offence, and it exists because the seal is genuinely load-bearing: it is the difference between a drawing and a legal document. The mundane failures are administrative — expired licences, wrong-state seals, unsigned electronic stamps — and they stop submissions just as thoroughly as bad engineering.