回复：请问关于486收据问题！

Do not worry. You can trace your case number from the info. on the check that INS cashed. I had the similar experience. I got my I-485 receipt notice (I140/I485 concurrent filing) one week after filing. While, now it's one month later, I have not got my I-140 receipt yet. My lawyer checked the check INS cashed and located my I-140 case. I checked online with the case number and found out my I140/485 were received on the same day.