Your wife can prove her domicile by submitting copies of her US tax returns (which are required anyway), her driver license, car insurance, health insurance, etc.
No, a person who isn't a US Citizen, or Lawful Resident, can't sign.
But, he can give her $120,000 as a wedding present.
Talk to the immigration attorney doing the L papers ... not someone in HR ... .not a legal assistant ... not a manager, nor a secretary.
Simple Answer: You were denied entry ... not denied a visa ... keep that in mind when reading the questions.
1. Do not renew online ...use the paper forms
2. Take card of the child support issue
3. Have a lawyer help you with this.
If you are low income go here: www.justice.gov/eoir/probono/states.htm or http://www.immigrationlawhelp.org/
Immigration is federal (national) law. ICE operates on a national level. There is no such thing as 'jurisdiction' when it comes to investigating a case.
Thus, they can assign as many officers from as many offices as they wish. Many times it makes more sense for the same officer to interview all the people ... rather than have a 'disjointed' investigation.
It is not our place to be concerned as to how they do their job.
Does this answer your question(s)?