H1 Transfer ma help chaiyo sathi ho. I am trying to transfer my H1 from my current employer (Consultancy) to another consultancy. Mero ahile ko consultancy le letter of reference dina mani rako chaina. I have the original H1 approval document though. My question is do I need that referene letter from previous employer for H1 transfer or I-485 or any other processing for GC. 

Thanks in Advance!