A parcel is rarely truly lost. Most "lost" parcels are waiting at a hub, stuck in customs or delivered somewhere unexpected. When one really is gone, the fastest route to a refund or replacement is through the seller.
First confirm it is lost: check the full scan history and compare the time since the last scan with the usual transit time for the route. Then contact the seller with the tracking number and last scan; they can open a carrier claim and send a replacement or refund. If the seller does not help, use the marketplace's buyer protection or a payment dispute before its deadline.
Sellers who ship regularly can save every number in 24hTrack, where shipments are checked automatically and parcels that stop moving are easy to spot, instead of finding out from an unhappy customer.
Carriers usually treat a parcel as lost after no scans for several days domestically or several weeks internationally. The exact threshold for filing a claim is set by each carrier.
If you are the buyer, contact the seller. The seller is the carrier's customer and can file the claim and refund or replace your order.
How to track any package · Delivered but not received · Tracking not updating · Tracking number formats · Tracking status meanings · Track packages from China · Package held at customs · Bulk package tracking · Tracking in Google Sheets · Package tracking API · Carrier statistics · 24hTrack vs 17Track