Hi All,My father's immigrant visa interview was march 24,2017 that day they gave him 221g letter asking for new joint sponsor we sent in new joint sponsor documents April 21,2017 he received a call from Islamabad embassy and asked him to come to embassy again on May 1 2017 my father asked the caller what for and do I need to bring anything along ? Caller said he doesn't know he was just told to call you and notify that you need to come to embassy again.I asked my father they took his finger prints and oath he says finger prints yes but no oath so I'm thinking maybe oath then what you all think?