Receipt I-797 never received

[DesiOPT-FaceBook-Fan]

Ur receipt no will be in ur opt card

[DesiOPT-FaceBook-Fan]

To get ur details of a receipt contact USCIS's customer service and extplain your situation..and they will help you. Secondly, Contact your DSO and ask them how to fill the STEM extension form....

[DesiOPT-FaceBook-Admin]

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I received my OPT in Three weeks and Never received a receipt I-797. Now when the time has come to apply for STEM extension I am unsure of what to fill in Item 11 field Dates on form I-765 (http://www.uscis.gov/files/form/i-765.pdf).Can any one please help.
-Should I simply mention the start date of my OPT?

This was posted on https://www.facebook.com/desiopt1 on 18th September 2013