My friend and I (both visa nationals) were traveling from Canada to the US by bus last weekend. To my surprise, the immigration officer didn't stamp either of our passports and instead simply waved us through after scanning our documents. The entry was properly recorded, but I can't help but wonder if we didn't break some law by entering the country without a passport stamp.

What's the reason behind the lack of a stamp? Isn't it mandatory for non-Canadian visitors?


1 Answer 1


It sounds like you entered the US under automatic revalidation.

Under automatic revalidation, people who have been admitted to the US in a non-immigrant status can travel to Canada or Mexico (and, for F and J visa holders and VWP participants, various Caribbean islands) for up to 30 days and return to the US under the same admission that they had previously entered under.

This is the so-called 90 day rule that people mention when talking about visiting these places from the US: Because you are admitted under your previous entry, you don't get a new 90 day admission; instead, your previous 90-day admission still applies and you must depart the US before that date.

  • So you're not supposed to get a fresh passport stamp if you have a valid I-94 already?
    – JonathanReez
    Mar 31, 2018 at 17:39
  • @JonathanReez In my experience, a new I-94 was created to show the latest entry point and date. I'm not sure until when it was valid but I guess it was the same date as the original. (Passport was only stamped on the first entry)
    – user58558
    Mar 31, 2018 at 19:06
  • 1
    Technically "Automatic Re-validation" and the "90 day rule" are unrelated. The former is only for people with a US visa, whilst the latter is for people entering under the visa waiver program. Conceptually they are similar, but technically they are different.
    – Doc
    Apr 1, 2018 at 8:58
  • 1
    @MichaelHampton I'm too lazy to look up the regulation number covering it, but the full name should be enough - "Automatic VISA Revalidation". You can't use automatic visa revalidation if you don't hold a visa...
    – Doc
    Apr 2, 2018 at 5:05
  • 1
    OK, seems I wasn't that lazy. 22 CFR 41.112(d)(1)(i)
    – Doc
    Apr 2, 2018 at 5:08

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