That's been UPS's policy for a bit over a year now. Nonlicensees can't ship any firearms or firearm parts through them. FedEx stopped allowing nonlicensees to ship firearms a while before that. USPS will ship long guns, but not handguns. You could ship firearms without telling them, but you're screwed if they lose it or damage it. They'll want some proof of value and pictures of the damaged box and item, which you likely won't be able to provide without them denying the claim. To me it's not worth risking a loss or commiting fraud to save a bit on shipping. You can also get a shipping label from an FFL, like shipmygun, and use that.