This past week there appears to have been a change to shipping status for returns.
Previously, "In Transit" meant that the package had been scanned by the carrier and not yet delivered. About a week ago that seems to have changed because I have a number of return packages where the return label was created (I run a rental service and send the return label with the item), and the shipping status shows "In Transit" the truck icon.
This is not helpful because I previously relied on the status to indicate who had not yet "put the package in the mail". Now all packages (other than delivered) show "In Transit", so I have to check the individual USPS tracking to see if just the label had been created or if it had actually been scanned.
I have sent several messages to support about this change in behavior, along with screenshots and tracking links to illustrate the issue, and they have been unhelpful in just spitting back the standard definition of "unknown" and "in transit" which is contradicted by the evidence I have supplied.
