Bliss555 wrote:What do you mean 'let sleeping dogs lie'?
"Let sleeping dogs lie" means "do absolutely nothing."
He cannot serve NS as he would get arrested.
No, he
can serve NS. It's
possible. It's just not an
attractive prospect to your son. Plenty of people get arrested, some voluntarily.
The next best thing is to be divested of citizenship.
Is it? Why?
President Carter
pardoned Vietnam Era draft dodgers, but those who successfully renounced their U.S. citizenships didn't get their citizenships back. I'm certainly not predicting that the Singaporean government will end its NS requirements much less pardon those who skipped them, but both of those things actually happened in the U.S. in the 1970s.
What is the reason for hanging to the citizenship of a country where he would have no rights?
You're assuming it's a choice in his situation. It's not, but let's assume that for sake of argument. What reason is there for him to even lift a finger doing anything about his second citizenship? Being able to answer "No" to a second citizenship question on a Chase account opening application is not a good reason. (Chase could just change the form next year and ask about past citizenships.

)
What (added) harm is there that the Singaporean government considers your son its citizen? None that I can think of, and I am imaginative in that respect.
The documents have to be returned anyway....
Do they? Says the government requiring your son to serve NS, a requirement your son is not going to comply with?
But if formal renunciation is just going to be a futile exercise....
It would appear so, yes.
....then the documents can just be returned to the relevant authorites.
Or not.
I seem to be missing something. In what way might this be construed as perjury or fraud? Could you please clarify?
It's impossible to commit perjury or fraud with zero communication -- or at least I'm not that imaginative. It is
hypothetically possible to commit perjury or fraud with some communication. A defense lawyer (I'm not one) would probably advise a client to shut the (bleep) up in such circumstances, to shut down all communication out of an abundance of caution unless there's a damn good reason to communicate, and then only with his lawyer's approval and in his lawyer's presence. So what's the damn good reason? I can't think of one, but perhaps your imagination is better than mine.