I couldn't tell if the screenshot was from an LLM or the post office's website. It sure looks like what a post office would say so I'm inclined to think that's not autogenerated. A total ban on anything containing lithium batteries, as the company claimed when returning the shipment, seems wrong as well. We receive laptops from customers for doing pentests all the time, for example. Australians could never order a phone or earbuds that didn't already make it into Australia via another shipping company. Etc. Why'd they forego all that custom? How many electronics nowadays don't have such a battery? This doesn't sound to me like it was only GPT spewing nonsense

But yeah I had the same question: OP said that ChatGPT initially produced words that turned out to be sensible, but not where that later screenshot came from