Do they need any other documents, visas, etc?
1 Answer
Polish citizens do not need a visa for Canada.
And since US visitor visas issued to Polish citizens are multiple-entry, you can be re-admitted to the US anytime if the visa's valid or if you stay in Canada for less than 30 days (even if the US visa is expired)
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4Or in most cases, even if the US visa has expired via Automatic Revalidation. help.cbp.gov/app/answers/detail/a_id/1218/~/…– DocJan 12, 2017 at 22:33