in transit od is likely a shortened tracking update meaning “in transit on delivery” or similar. It indicates that a package is currently en route but has not yet reached its destination. Understanding in transit OD helps customers interpret USPS or carrier status messages, especially when awaiting orders from platforms like Temu, AliExpress, or Shein. Knowing a package is in transit reassures customers it’s on the move, even if arrival may still take a few more days.