To sponsor your girlfriend for a fiancee visa, you will need to submit a petition on form I-129F to USCIS along with evidence of your citizenship, evidence that you have met her in-person within the last 2 years, evidence of good faith intention to get married within 90 days after she arrives in the US and to start a life together, and copies of all your and your fiancee's divorce decrees. The evidence can include, but is not limited to, copies of boarding passes, airline ticket stubs, flight itineraries, photos, entry/exit stamps, receipts, birth certificates, phone records, wire transfers, letters, emails, cards, etc.
Answered on Jul 08th, 2013 at 11:05 AM