I have reciept number of regular processing. Now my employer has started premium processing. I don’t know if it will get processed in premium or not, but on USCIS site I get this message.
On XXX XX, 2017, we received your Form I-129, Petition for a Nonimmigrant Worker, Receipt Number XXXXXXXXX, and mailed you a receipt notice. It is being processed at our California Service Center location. The notice describes how we will process your case. Please follow the instructions in the notice. If you move, go to www.uscis.gov/addresschange to give us your new mailing address.
Based on that receipt number there alone can I switch jobs or would I need something else from my current employer?