bisal-ji:

While you are very right that little knowledge is a dangerous "thing," you proved it yourself by not reading the whole thing and the context that I was referring. I said:

"The renouncement is not enforced with some documentation but through verbal commitment when you take the oath."

My wording "doesn't endorse" would have been better than "renouncement."

 Follow these links for more details:

http://www.uscis.gov/files/nativedocuments/Citizenship_2004.pdf

And this too:

http://www.uscis.gov/propub/ProPubVAP.jsp?dockey=1473ffd4587bafcbb27d71df10c66c6f