I had a question on sending I-131 and I-765 related documents to VSC. I was thinking of sending it by USPS Express mail or by FedEx? I am asking this because sometimes, I have experienced mail being returned because there is no one to collect it. Since this is the first time I am sending document to USCIS, I want to find out what is the most appropriate mechanism for sending the documents.
Thanks,
Thanks,