My parents both went for their B1/B2 visas together. My mum was asked a couple of easy questions and was approved. My dad was not asked any questions and was denied and given form 221(g). It was surprising because my mum does not work but my dad does have a good, high-ranking job. Money and his need to return to his job (as well as other factors - literally his whole family are in his home country, he has extensive international travel history, etc.). Of course the reason could be anything but I wonder if it may have been that he has a very generic, very Islamic name and they had to make sure it was not a name they have that is on a ban list of some sort. Anyway, he did fill out the questions asked of him on From 221(g). If it might shed any light, the questions were: travel history for the last 15 years and source of funding for travel, information on his siblings, addresses for the past 15 years, all previous passport numbers and country of issuance (he could only find his passports from 2003 onwards) , jobs and employees for the last 15 years, phone numbers for the last 5 years, e-mail address and SM handles for the last 5 years (this he said he had but that it's handled by his employees).
It's been a month since he submitted his responses. I know AP could take months and months but at what point can we e-mail to ask about it?
TIA.