Looking at previous discussions it would appear that there is no list of valid tracking companies. However the documentation indicates that there is such a list
If you are creating a fulfillment for a supported carrier, you can simply send the
tracking_company, andtracking_numbersand Shopify will generate thetracking_urlfor you. If creating a fulfillment for an unsupported carrier (not in thetracking_companylist) send thetracking_company,tracking_numbersandtracking_urlsfields.
Should I believe the documentation or should I believe previous discussions on this issue ? ( I donât know which is most recent. The previous questions or the documentation)
Maybe I am asking the wrong question. Is there a list of "supported carrier"s ?