only trackable if you're logged in the correct account More on reddit.com

If it is being delivered by Amazon logistics you will probably not be able to track it. Some people have said they have been able to track packages being sent to them but typically only the sender can track them through their Amazon account. More on reddit.com

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Give ship.amazon.com a try and see if your regular login works . It’s the portal for amazon logistics if you ship with them but I never tried a tracking number from and fba order. I’ll do it later if I remember More on reddit.com