If she has an automatic extension of employment authorization, then she is allowed to work. As such, she is not engaging in unauthorized employment.

I cannot tell you for sure, but it seems very likely that they require you to be in valid, nonimmigrant status and not that your visa be unexpired.

No, a receive for a waiver application is not a document that authorizes a person to be admitted into the U.S.

Could have been lost in the mail, destroyed or never produced. Contact customer service and try to get them to produce a new card and if that...

There is a bar to admission to the U.S. for a person convicted of a prostitution offense, and that would seem to apply to you.

If a person is the U.S. on an employment based visa, and is working for the employer who filed that visa petition, then the employment is...

No, I have never seen USCIS deny an application because of an error for a person's date of birth. So no, I have not seen that happen.

If you qualify as a derivative citizen you file for N-600. If not, you file form N-400. That's what you need to do.

In my experience they will decide after 60 days as a matter of discretion simply not to extend the approval and the application will be...

He should be sure that if he visits the U.S. it is for a specific purpose, a limited amount of time, and that he clearly has funds for the trip,...