evidence: Fact Check: Is The Post Office Losing Money By Delivering Packages For Amazon? [...] Plunkett says no one really knows what kind of deal Amazon made with the Postal Service because the details are sealed. But he says contrary to what the president tweeted - that they lose a fortune - the Postal Service does not lose money delivering Amazon's or anyone else's packages. [...] PLUNKETT: Amazon probably looks very different from the rest of the Postal Service's shipping business because they have enough volume in their own network of distribution centers, so the vast majority of their packages are being entered locally, and they're very cost-efficient for the Postal Service to handle for the most part.