I was going to ask a similar question. I've been using Deliveries for Android for a couple of years. Recently realized I could track TBAxxxxxx Amazon.com tracking numbers through the app, as the only message I get from the Amazon app is the item has been delivered. But when adding a TBAxxx tracking number, I get a Captcha challenge, which I answer then a message that it was answered successfully, and to 'please log in again'. Refreshing the package goes through the same loop.