Recently, I was asked by a reader to explain the difference between a document that is ‘sealed’ by an engineer (or architect) and one that is signed ‘under seal’. This question prompted this post, as others may also be wondering about the distinction. [Hi Ed! Thanks for your question]

Professionals have ‘seals’ that show that they are registered (Engineers) or licensed (Architects). As most of you likely know, your professional seal is something that is hard won and which is used when—and only when—your plans were made by you or someone under your direct supervisory control. Your signature represents that you were in responsible control over the documents, and that they have met the required professional standard of care. (21 NC Admin Code 2-0206 (a)(11)).