Why is my Serpost tracking not updating?

Tracking often pauses during international transit or while an item waits in the customs queue at the Lima inward office of exchange, where no new scan is recorded until SUNAT acts. First confirm you are using the postal S10 number and not the order ID. If there is no movement for more than a week beyond the expected window, check the last location and contact Serpost with the number to open an inquiry.