Today I received my receipt from the Department of Homeland Security. I am not sure if the replies will say NOA1 or NOA2 etc ... so until I get the hang of things I will just provide details
Hi, No it will not say noa1 or noa2. On the top right hand corner of my first letter said, I-797C Notice of Action, which was the receipt and my 2nd letter said I-797 Notice of Action, the approval letter. Good Luck.