TikTok has a list of approved shipping providers and only supports tracking numbers for providers on that list. Shiptheory is not able to upload a shipment tracking number if it is not supported by TikTok.
In the UK, the following carriers are supported:
- Amazon Shipping
- APC
- DHL
- DHL Parcel UK
- DPD
- DPD Local
- DX Delivery
- EVRi
- FedEx
- Parcel Force
- Parcel2Go
- Royal Mail
- UPS
- Whistl
- Yodel
In the US, the following carriers are supported:
- Amazon Shipping
- DHL
- FedEx
- UPS
- USPS
TikTok may change the list from time to time. You may refer to here their latest approved carriers in UK.