Advisory opinion for O1 visa petition

[HAA]

Hello,

I am currently preparing a petition for O-1 visa (in the sciences). 

 I have one question, regarding the requirement for the advisory opinion letter for this petition. 

 

In the USCIS website regarding Application Process O-1 Visa (link below), there seems to be a provision for choice between a peer group (organization) and individuals with expertise for writing this letter: This section, under the sub-header 'consultation' reads as  follows:

 

        A written advisory opinion from a peer group (including labor organizations) or a person with expertise in the beneficiary’s area of ability  

 

Does it mean, one has the option to use either a letter from a professional organization or peers with expertise in the field? It is easier for me to get the latter. 

 https://www.uscis.gov/working-united-states/temporary-workers/o-1-visa-individuals-extraordinary-ability-or-achievement

 

Thank you

[bummerman]

The advisory opinion is recommendation letter. You would need a few of these letters. These letters are better obtained from people you know and also from people who don't know you directly or associated with you in the past (independent reviewers) for a strong petition