H1B transfer. Can an immigrant start working without USCIS receipt

U.S.C.I.S. believes that you should wait until you receive the receipt before beginning work with another employer when transferring your H-1B. The reason is that even though the FedEx receipt will tell you that the petition has reached the center, there is the possibility that the filing may be rejected for various reasons. Examples are incorrect filing fee checks, missing signatures, missing application pages, etc. It is always safer to wait for the receipt as your work for the second employer would be illegal if the petition is not properly filed. Due to the limitations of the Lawyers.com Forums, Alan Lee, Esq.'s (the "Firm") participation in responding to questions posted herein does not constitute legal advice, nor legal representation of the person or entity posting a question. No Attorney/Client relationship is or shall be construed to be created hereby. The information provided herein by the Firm is general, and requires that the poster obtain specific legal advice from an attorney. The poster shall not rely upon the information provided herein as legal advice nor as the basis for making any decisions of legal consequence.