A cell that carries out the final response or function of a particular process. The main effector cells of the immune system, for example, are activated lymphocytes and phagocytesâthe cells involved in destroying pathogens and removing them from the body.
Best Answer: Yes you can track it online here: https://tools.usps.com/go/TrackConfirmAc... The tracking number should look like this: CP 000 000 000 US. You can find it on the receipt, and the customs form you filled out.
Add your answer. Tracking USPS package without tracking number.? I shipped a package from California to Florida around 8-9 days back through USPS. but at the time forgot to take a tracking number. now the receiver in Florida is saying that the package has not been delivered and that he wants the money back.