I believe so too. I called USCIS and they told me that they cannot send me the receipt notice again. They were in fact surprised that i was even asking for it. I don't know why some lawyers (including mine) are making a big deal about it.
I have lost the I-485 receipt notice and plan to travel on Advance Parole/ EAD combo card. I do not even have a copy for my receipt but I do know my receipt number. Can I re-enter US without the I-485 receipt notice ? I have my biometric appointment letter but it has my middle name spelled twice "(First Middle Middle Last) "which is a typo. So i am trying to avoid using that because of the incorrect name concern. Or does it not matter?