We just started hearing from clients on Monday for an envelope that we mailed July 19th - three were denied and one was approved. I checked the tracking status at USPS and it shows that it is in-transit arriving late and the certified mail shows that it was initiated but does not show it was received/signed (and we don't have the green receipt back). I tracked a batch that we mailed on July 30th and the tracking/certified is the same so it doesn't look like the end steps are being done when the envelopes get to the IRS.
AmyETPA - what was your resolution - were you able to get through on the phone number?