Hi I am currently working on L1 visa and a different employer is processing my H1B with COS and the effective start date of employment is Oct 1st 2012. It is still under initial review with USCIS. I wanted to know assuming the approval status shows up on USCIS website on October 8th, and the approved I-797 document reaches my hand on October 11th. Without knowing about the approval until I receive the document, if I still work on the three days for my current employer between Oct 8 and Oct 11, w