Let somebody tell Superman he can't live on Earth with his family and lets see what happens. 

I'd be interested to see that Sheriff in Arizona ask him for his papers.

 Well unless the goverment has some Kryptonite, they can't do anything.

" I'd be interested to see that Sheriff in Arizona ask him for his papers. "

He probably went to one of the two states in the Union - I believe it is Minnesota and California - where you can obtain a driver's license without a social security card or number, and went from there.

"it should be completly overlooked "

He's a refugee and he can be granted human asylum in the US because his planet was destroyed.

Fox news would have a fit and fall in it if they ever found out.

It's complicated.

In Smallville, Lionel Luthor arranged all of the forgery of documents so that it would appear as though Clark was legitimately a citizen.. Maybe there was some sort of benevolent being that helped them when they were starting out in the comics too? Although it's probably more likely Superboy super-hacked the computer systems he needed to to become legit, lol

When I'm not working I can give a longer legal analysis on this but it should be noted that the Byrne version used the birthing matrix to avoid the issue making him a naturalized citizen by birth ("jus soli" type citizenship under Title 8 US Code Sec. 1401).  I'm not 100% clear on which origin story is binding right now.  Birthright does not use the matrix and Secret Origin does not have the rocket scene (yet) from either set of parents' perspective... but if the rocket shape is meant to cite the earlier origin then that too would lack the matrix. 
 
So... at least during Man Of Steel it was a consideration. 
 
When I have time I'll explain the consequences and his options if under another origin.

" Fox news would have a fit and fall in it if they ever found out. "

He's an outlaw and a menace to society.

Why not?  
If it was up to Obama we would just open the borders and let everybody in, and we would have to hand them half are paychecks too!

It should be overlooked for the reasons of simplicity. Comics never show the characters going to the bathroom, filing their taxes, or how non-flying/transporting characters get to work in the morning.

he'd probably leave

Maybe Clark HAS applied for citizenship, they just don't show it in the comics because it's boring? :P

Someone call la migra

if he as in superman lives in the Fortress Of Solitude    not us soil then hes not living in america!

Thats one problem with Superman, but for example, does Wonder Woman has a greencard to work on America? there is no Amazon embassy anymore

no

did the kents adopt him their might be some papers.

Well considering the Kent family have passed him off as their own child, I am pretty sure they got all the legal documents they needed, because he is "their" son. So Clark Kent is most definitely a legal citizen... and no one questions Superman because he's not just a citizen of the US he is a citizen of the world at large. Hell even the Soviet Russians... and Communist China acknowledges him as a hero and they were all evil back in good old days of comics.

" In Smallville, Lionel Luthor arranged all of the forgery of documents so that it would appear as though Clark was legitimately a citizen.. Maybe there was some sort of benevolent being that helped them when they were starting out in the comics too? Although it's probably more likely Superboy super-hacked the computer systems he needed to to become legit, lol "

People, Superman does not really exist. It is a fictional character. Do you need to discuss this sort of things?

He's technically a illegal because we never authorized him being him here when he arrived as a kid & a refugee since his home planet got destroyed

 he is good with all the life save, you can slip this under the carpet

Under the Child Citizenship Act of 2000, he would have been granted citizenship, as he had been legally adopted by the Kents, who were American citizens, but he was over the age of 18 on February 27, 2001.  
 
I am guessing he was issued a "Baby Doe"  birth certificate at the orphanage, and as such was registered as and American birth (falsely) before the adoption. If anything, the Kents committed fraud by not revealing the origin of the child (being a suspected alien). 

 Being an attorney I can tell you that citizenship is determined by one's domicile.  As Superman, his domicile would obviously be the Fortress of Solitude.  This is because domicile is typically determined by physical presence with an intent to remain indefinitely, I think it could be argued that Superman satisfies both of those requirements.  As Clark Kent, if you assume that he was supposed to be the Kent's naturally born child, domicile and citizenship for that matter are irrelevant because he would have been born an American citizen.  While the Kent's may be liable for some type of fraud, Clark would most likely not as he was an infant and unaware of the subject.  Great question, but it brings up the traditional one about Superman in general, is he Clark or is he Superman?  I vote for Superman.    

I always just choose to think that the Kents figured that out and the writers didn't feel like it was an exciting enough story.  Although today he would be a US Citizen by marriage wouldn't he?  Even if they tracked him down he's married to Lois who is a US Citizen.  Wouldn't that work?

DE TOOK ERR JERRBS!

He may be an illegal immigrant but he's saved America and the world countless times. Besides, he's grown up in America and raised there so he has the same right to be an American Citizen as anyone else.

It should be completely overlooked. It would be considered "biting the hand that helps you" no doubt about it. If Americans don't hold up to their own laws then why should they expect it from those that go to live there and tries to hold up the laws almost by himself. Besides that there are many citizens that live there but are not going under the names they were born with.  During the Death of Superman arc they did say that even though he was an alien he was an American so he was to be buried as such by the president when some scientists wanted his body.
If they ever made that into a storyline I hope they add he moves to Canada because up here we wouldn't mind. lol

maybe he got apodted by the kents and they lived here so that makes him american.

In one old story every nation in the U.N. (America included) passed a resolution making Superman a citizen of the Earth and all it's nations, and so able to fly over any boarder without restrant.

Of course Superman is a legal resident of Earth, why wouldn't he be? He was legally adopted by The Kents and was then, as TerryMcC mentioned, made into a citizen of Earth and all its nations by The U.N. and allowed to cross over any border without restraint. That information alone should be more than enough to convince everyone that he is indeed a legal resident of Earth.

I'd actually like to see this in a comic book arc.

"In the John Byrne Man of Steel tales, Jonathan and Martha passed him off as their birth son.  Their was a huge snow storm (caused by the Manhunters-- see Milennium mini), and Smallville was snowed in for months.  The story the Kents used was that Clark was born during that time.  So he has a birth certificate and everything.  Case closed.  Let's move on now, shall we? :) "

" I'd actually like to see this in a comic book arc. "

" @TheMess1428 said:

" I'd actually like to see this in a comic book arc. "

             And Lex Luther would be the mastermind behind the hole thing.  "

i think he is