I found all Checks were cashed today. But the numbers begin SRC....
It seems that my files were transferred from NSC to TSC due to my I-140 was approved by TSC. Well, I am waiting for it for 3 months, worring so much. Thus, please take easy if you are 07/02 filer without receipts. If you are sure the package was delivery to NSC or TSC, please wait for it... you will get receipts finally. Good Luck.