@Robert ********
And I’ve traveled 22 times since
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and never been asked either. It’s rarely checked at the immigration but you can risk your airline will ask for it as they can be fined and responsible for your return if formal requirements aren’t fulfilled. When people ask about visa exemption I feel it’s correct to also mention the formal requirements as we know people from time to time are denied check in and even de-boarded on a three legged flight regarding this.