I am an immigrant visa applicant under the family-based preference category (fourth preference F4) whose case is undergoing processing at National Visa Center. I have been sent a immigration visa processing fee bill from NVC IN New Hampshire. I have certain questions which need clarifying. I would be grateful if you kindly respond to them at your earliest.
1. Do I have to be a green card holder or US citizen to apply for my married son or can I apply now when and if I get the immigrant visa?
2. Which process will be faster for my married son to get immigrant visa: if I apply now, i.e. with immigrant visa, or after I get the green card?
3. How long would it take to get a green card? How long would it take to get permanent citizenship after getting green card?
4. Can anyone, other than the petitioner provide with the Affidavit of Support, needed for immigration to the USA?
5. Can I send the immigration fee bill of $335 to the Mumbai embassy, which deals with visa cases in India, in local currency instead of to the NVC in New Hampshire in dollars?

1. Do I have to be a green card holder or US citizen to apply for my married son or can I apply now when and if I get the immigrant visa?
2. Which process will be faster for my married son to get immigrant visa: if I apply now, i.e. with immigrant visa, or after I get the green card?
3. How long would it take to get a green card? How long would it take to get permanent citizenship after getting green card?
4. Can anyone, other than the petitioner provide with the Affidavit of Support, needed for immigration to the USA?
5. Can I send the immigration fee bill of $335 to the Mumbai embassy, which deals with visa cases in India, in local currency instead of to the NVC in New Hampshire in dollars?