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These are the valid values for the optional "CarrierName" field:
- USPS
- UPSFedEx
- UPS Mail Innovations
- Canada Post
- DHL
- UPS Mail Innovations
- Purolator
- AustPost
- FedEx
- FedEx SmartPost
- GLS
- Intelcom
- LSO
- OnTrac
- Purolator
- Spring GDS
- AustPost (AU)
- Express Post (AU)
- Fastway Couriers (AU)
- Interparcel Express Post (AU)
- TNT (AU)
- Fastway Couriers (AU)
- )
- MRW España (ES)
- InPost Paczkomaty (PL)
- 99 Minutos (MX)
- AMPM (MX)
- Carssa (MX)
- PaqueteExpress (MX)
- Redpack (MX)
- Estafeta (MX)
- NZ Couriers (NZ)
- NZ Post (NZ)
- Post Haste (NZ)OnTrac
- DPD (UK)
- Royal Mail (UK)
- (Other)
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