An Assessee is non-resident, he filed return u/s 139 (1) on 30th july,2009 i.e.A.Y.2009-10, The ROI is already assessed U/s 143 (1) and Refund is also duly granted by the AO. However th same AO has issued notice u/s 142(1) asking for requirements.. is the notice U/s 142(1) valid???