The RRE signature is currently only available for loading on the Monday of each week (and not available the same day) via your Docsmit account.
We can help you ask the USPS to email it to you. On secure.docsmit.com click your mail piece under the Sent tab. Click the USPS Tracking Number and a window will open on usps.com for that tracking number. On the right side, click "Return Receipt Electronic". Fill in your name and email address. The USPS will email it to you as soon as it is available. We will also still email it to you along with our certification and your original document.