I e-filed my application, but it does not show up when I enter it into the “Check My Case Status” webpage. How can I verify that it was submitted?

Wait at least 3 business days after filing to check status.

If you are checking the status of a form using 'Case Status Online', USCIS states to please wait at least 3 business days after filing the form before checking your case status online as it may take some time before showing up in the system. CITATION: Page 24; http://www.uscis.gov/sites/default/files/USCIS/About%20Us/Electronic%20Reading%20Room/Customer%20Service%20Reference%20Guide/File_Forms.pdf