Proof of the purpose of the trip, documentation showing strong ties to their country to convince the consular officer that they will not remain in the US.
J Charles Ferrari Eng & Nishimura 213.622.2255 The statement above is general in nature and does not constitute legal advice, as not all the facts are known. You should retain an attorney to review all the facts specific to your case in order to receive advise specific to your case. The statement above does not create an attorney/client relationship. Answers on Avvo can only be general ones, as specific answers would require knowledge of all the facts. As such, they may or may not apply to the question.
An invitiation from you and your fiance is what is needed to be provided by you (and a letter if you wish). Your friends and family (not sure from what country) may need a visa - but regardless, will need to show to the consular officer or both, ties that bind them to their home country and proof that they will be in the US for a temporary period.
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Your family and friends from your home country will need to initiate contact via the web and/or set up appointments at the nearest US Consular post to their residences in order to begin the process for obtaining B-2 tourist visas to attend your wedding celebrations. In addition to your "Save the Date" notification to each of them, you should prepare an "invitation letter" which describes the dates and events relating to your marriage and provides both your and your future bride's contact information for each of them to provide to the consular officer who will be handling their visa request(s). Remind the "guests" that they will each need to provide the consular officer with sufficient documentary evidence to demonstrate that they have strong ties to their home country and "no immigrant intent".
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