The Guardian: source for 35 page "dossier" is "consistently reliable, meticulous,

[Calista241]

58. I just got back from Belgium, another EU country, and i got both an entry stamp and an exit stamp.

Every time i've ever traveled to Europe, in a time spanning the last 10 years or so, I've ALWAYS gotten both entry and exit stamps. It's how they track when you entered the country and how long you've been there, for cops or other gov't enforcement that may not have immediate access to an immigration computer.

So yes, you do not need a visa to travel to the EU, but you still need a passport, and it's always stamped on both entry and exit, at least in my and everyone i know's experience.

The only real exception to this is travel to Israel. An Israeli stamp in your passport can result in your entry rejection and deportation from other middle eastern countries, like Saudi Arabia, Qatar, Kuwait, the UAE and others. Most people i know that travel to both Israel and other middle eastern countries have two passports for this reason.

Now he could have bribed someone to not stamp his passport, or the law enforcement officer in the booth that day may have neglected to stamp his entry, but I don't think either of those situations is likely. He also could have flown a private jet into a private airport, and somehow skipped immigration that way, but that type of travel could be easily discovered through flight plan analysis, etc.