True, but who and how often obtains a certified copy of Certificate of Naturalization?
Though archived, here's what USCIS had to say about it:
You do not need to obtain a Certified True Copy if the U.S. government asks for a copy of your certificate for official U.S. government business. You may use a normal photocopy of your certificate for legitimate U.S. government business. For example, when you apply for a U.S. passport, you must submit the original Certificate of Naturalization, and you should also submit a normal photocopy that has not been authenticated.
Source:
https://www.uscis.gov/archive/how-do-i-obtain-an-authenticated-copy-of-a-certificate-of-naturalization
Again, why would USCIS tell what do submit for passport application, if it's DOS problem, I'm not sure 😃
I guess that's why they archived it.
USPS expects to submit original, though certified copy technically is OK.
How does one get a certified copy? Have you done it personally?