Notice period? Sure! in H1B : General Posted February 18 · Report reply 11 hours ago, rksingh said: You can be approved for a new employer but do NOT have to start immediately. H1B is never "transferred". Your new employer will file a NEW H1B petition for you.....and that is why the old employer can never come to know that a new H1B petition has been filed on your behalf. And even after your new H1B approval you can still continue to work for your old employer. And, Yes, you can start work with your new employer as soon as you receive a Receipt notice. Its just a little more risky than waiting for approval. Thank you, that clarified my doubt. I sincerely appreciate your help!