:A US passport must be valid for at least 6 months since the last day of your vacation to be allowed back into United States.
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I can assure this is not true and not on that site.
I returned last year with just 8 days left of validity on my passport. The Immigration officer took less the a few minutes reading his screen and I was in the USA. Was as easy as if my passport was good for 10 years.
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Sorry for being redundant as I did not see the other posts till I refreshed