can work before formal letter comes for a new h1b case?

来源: 2006-02-01 14:58:55 [旧帖] [给我悄悄话] 本文已被阅读:

Can One work with payment before the formal approvement letter of H1B arrives for a new H1b case in University or Research Institute??? Is the email notice from USCIS not valid??? Thank you for your any information.