Multi-channel
How each marketplace validates a tracking number
Upload a tracking number and something happens behind the scenes on every marketplace. What happens, and when you find out, differs enough to matter.
The common requirement
Every platform in this comparison ultimately wants the same thing: a number that resolves with a named carrier and produces scan activity. A number that never scans fails everywhere, eventually.
The differences are in timing and visibility, not in the underlying standard.
Where they differ
- Amazon - measures it formally as Valid Tracking Rate, with a high threshold and real consequences
- TikTok Shop - validates relatively early and surfaces problems sooner
- eBay - more permissive on upload, with consequences arriving through claims and metrics later
- AliExpress - the supply side, where the number originates rather than being checked
The carrier pairing is the common failure
On every platform that asks for a carrier, the carrier and the number are validated together. A real number with the wrong carrier fails, and it fails silently, because the upload itself succeeded.
For dropshippers this is the dominant cause of tracking problems, because international parcels pass through multiple carriers and the number you hold may belong to any of them.
One check covers all four
Record the date of the first carrier scan for every number you upload, and review anything with no scan after 48 hours.
That single habit catches wrong carriers, fake numbers and slow handovers, on every channel, before any platform judges you for it. If you build one thing, build that.
The handover gap
A genuine number can exist days before the parcel is handed to the carrier. During that window it resolves to nothing and looks exactly like a fake to an anxious buyer.
You cannot close the gap, but you can stop it becoming a support conversation by explaining it once, at dispatch, rather than defending it later.
Where numbers come from matters
Tracking quality is a supplier property. Some suppliers reliably produce identifiable carrier numbers and hand over quickly. Others produce internal references, or generate the number days early.
Once you are measuring first-scan reliability per supplier, you have a ranking that predicts your tracking metrics across every channel you sell on - which is a far better basis for choosing suppliers than unit price alone.