There was ONE time I disclosed what was in the box. I used to use USPS all the time to ship snakes. This was about 4 years ago. I don't anymore. But this was when I was new to even the idea that you could ship a snake across the country and when I started doing it, I also received every snake I bought online through USPS too. I had no idea you can't do that.
Anyway, here's the story: I sold a male axanthic ball to a guy in Canada. Also the first and last time I dealt with an international sale. I took the snake to the post office to ship. Being so valuable, this time I got the insurance. I wrote "Axanthic male ball python" on the slip. Checked with the clerks to make sure it was OK to ship a snake because I just wanted to be sure. They called 3 other local post offices to check. After they got the APPROVAL from the other branches, my package was on its way. The guy claimed he didn't get his package because it was stuck in customs so I tried to track it down. After being passed around to many different people at the post office, none of which helped me or gave me any answer, I ended up speaking to the local Fish and Game office. About an hour later I had a knock on my door that I didn't answer. I had an agent calling me saying he wanted to talk to me. Coincidentally, I was about to be moving so I left a few days later and never did find out what he wanted to talk to me about.
The Canadian cancelled his checks after I had already deposited them and I ended up in debt because of it and out of a snake that I was only selling for $500 because I had lost my job and was about to get evicted from my apartment and needed money. On top of all that, I didn't even take the currency exchange into consideration and was getting ripped off anyway. Actually, I didn't know about it. I feel I was ripped off through the whole thing regardless of the post office issue. I think in all likelihood, he got the snake and cancelled the checks and intended to do this the entire time. I was 19 years old, new to shipping and even the whole online reptile trade. Prior to that, I got everything from pet stores. As a matter of fact, discovering Kingsnake a few months before this happened was really the start of it all, haha. So, lesson learned, I don't ship USPS anymore. But yes, I do ship and receive all my packages (about one a month on average) through FedEx or UPS and I never tell what's in it nor do I ever see on the packages I receive that the sender disclosed that information either. As far as the "FEDS" reading this, it makes me sick enough how much the government, or anyone for that matter, thinks they have the right to tell people how to live their lives. I absolutely refuse to worry about them trying to butt into our hobbies too. FOOK EM. If they wanna dig through thousands of packages a day trying to find my one a month, they're the ones with the problem... being so pathetically petty and bored.