法律上的規定原文在此，估計就是需要核查背景，實際6-8周拿綠卡已經

很快了，比多數的美國境內I-485案件快太多了

g) No visa or other documentation shall be issued to an alien if (1) it appears to the consular officer, from statements in the application, or in the papers ted therewith, that such alien is ineligible to receive a visa or such other documentation under section 212, or any other provision of law, (2) the application fails to comply with the provisions of this Act, or the regulations issued thereunder, or (3) the consular officer knows or has reason to believe that such alien is ineligible to receive a visa or such other documentation under section 212, or any other provision of law: Provided, That a visa or other documentation may be issued to an alien who is within the purview of section 212(a)(4) , if such alien is otherwise entitled to receive a visa or other documentation, upon receipt of notice by the consular officer from the Attorney General of the giving of a bond or undertaking providing indemnity as in the case of aliens admitted under section 213: Provided further, That a visa may be issued to an alien defined in section 101(a)(15) (B) or (F) , if such alien is otherwise entitled to receive a visa, upon receipt of a notice by the consular officer from the Attorney General of the giving of a bond with sufficient surety in such sum and containing such conditions as the consular officer shall prescribe, to insure that at the expiration of the time for which such alien has been admitted by the Attorney General, as provided in section 214(a) , or upon failure to maintain the status under which he was admitted, or to maintain any status subsequently acquired under section 248 of the Act, such alien will depart from the United States.