What is the process in order to get a Letter of Invitation for a Foreign Individual in order to obtain a visa?

What is the process in order to get a Letter of Invitation for a Foreign Individual in order to obtain a visa?
I have a friend from Argentina who is trying to visit me in California, no work or school involved, simply trying to visit as a tourist. She was denied her tourism visa (ineligible) & told to reapply. We want to make sure everything goes right this time in order to not lose any more time & money, & i heard a letter of invitation of some sort would aid the process. I've never done this before, so how do I get the process started? Do I just write this letter myself or do I have to get it certified somewhere? If so, is there a template I should follow? What should the general process of obtaining a visa look like? Any info wold help. Worst part of all is that the flight is already scheduled for July 1, so how long would the process take? Does it seem likely this process would take longer than 2 months? What are the chances we'll miss the flight (losing even more $)?
Immigration - 3 Answers
Random Answers, Critics, Comments, Opinions :
1 :
There is no such process. You are free to send her a letter asking her to visit you. However, it's unlikely to have any effect on the US Consular Officer who interviews her. The odds are the US Consular Officer will not even look at it. US law requires each visitor applicant to be treated as an intended immigrant. The law then requires the applicant to PROVE to the Consular Officer's satisfaction that he/she will not stay in the United States. The applicant must qualify on his/her own merit. The application fee is $131. It should not take more than a week or two to process the application. Personally, you're wasting your time. She's going to be seen as being at extremely high risk to overstay. http://argentina.usembassy.gov/why_a_visa_was_refused2.html Her best chance at getting a tourist visa is to demonstrate to the US Consular Officer that she has a GOOD job in Argentina, a home/apartment, regular and substantial income, etc.....
2 :
Letter won't help at all. She has to present very strong evidence of documentations that she would definitely come back to Argentina after visiting US. Such evidence includes letter from school enrollment, or employment letter stating when she is due back to work, ownership of property, house, lease of apartment, utility bills, dependent to her or family that she has to take care, such as her child, husband, ill mother and such. Applicants must demonstrate that they are properly classifiable as visitors under U.S. law by: Evidence which shows the purpose of the trip, intent to depart the United States, and arrangements made to cover the costs of the trip may be provided. It is impossible to specify the exact form the documentation should take since applicants' circumstances vary greatly. Those applicants who do not have sufficient funds to support themselves while in the U.S. must present convincing evidence that an interested person will provide support. Depending on individual circumstances, applicants may provide other documentation substantiating the trip's purpose and specifying the nature of binding obligations, such as family ties or employment, which would compel their return abroad. http://travel.state.gov/visa/temp/types/types_1262.html Also, if she is denied recently, she needs at least 3-6 months to build her case, before she reapply again. She has more chance loosing flight fare than getting visa in 2 months.
3 :
its all about convincing the officer of not willing stay in the us , whatever is the documentation she brings , focus on that...good luck

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