Hi, I am returning back to my previous employer after a period of extended maternity leave, they applied for a change of status from H4 to H1B with a start date of 11/17/2014. They received an approval notification by email on 11/19/2014, approving my H1B starting 11/17/2014. However, they will not let me start employment until the first week of December 2014, since they have not received the approval notice by mail. During this period of 2 weeks, I will be on H1B status without pay, which I believe is illegal and could jeopardize my green card application. I understand they need to wait for the approval notice in the mail, but at the same time I do not want to be out of status. Can you please advise me what to do in this situation? Thank you very much in advance.