He sent three checks: one for I 130 for $535, one for I 485 with biometric for $1225, one for I 131 for $575.
He received the returned files, but the checks weren't returned by USCIS.
-It is weird. Normally the check should have been returned together with the application materials.
還有可能其實原因嗎?
-No because the rejection reason is incorrect payment. You may go to the bank to cancel the original check and mail the two new checks with the application materials (clip the I-130 payment check on the I-130 form and I-485 payment check on the I-485 form). Just send the original documents back to USCIS and enclose the Rejection Notice.