How long does it take to get H-1B receipt in Premium Processing cases?

From our experience, the receipt# is usually emailed to the Attorney of Record/Employer within 48 to 76 hours from receipt. As long as the petition was filed properly, you need not leave the U.S. You would be considered in valid status. Have the Employer/Attorney check to see if the checks have been remitted. A copy of the cancelled check will have the receipt# as well.