The rule of USCIS states that after someone get an immigrant VISA on his passport, he/she must travel to USA to get the physical greencard regardless of whether the payment to USCIS to get the physical greencard was made before/after traveling to US.... That physical greencard needs upto 90days to be delivered to the Immigrant through mail..So my question was, after an immigrant travel to US but if he/she want to travel back to home country before he gets the physical greencard, would USCIS still process the physical greencard as if the person is still in US?