The deadline to send response to RFE for I-751 was today. I sent the documents last week with UPS overnight shipping and but UPS messed up the delivery which was supposed to be completed last week. However the package was delivered it today. I am not able to get hold of someone from USCIS to confirm if they received my documents. The delivery status from UPS says "Delivered - Left at dock". I am worried if USICS would be consider my documents received on time or not ?
The RFE document which I received mentioned if USCIC does not receive my response by deadline, the case would be denied .
Please share your experiences.