When a mother travels with baby (2 years) without father, what documents she needs to have for baby?

When a mother travels with baby (2 years) without father, what documents she needs to have for baby? - Father Teaching His Son How to Ride a Bike

My wife wants to travel to another country for one month and would like to take our baby with her. We currently live in the USA, but are originally from Ukraine. The baby has a child travel document with a valid USA visa.

Question: Does my wife need to have any additional documents for the baby so she can travel without the father? In Ukraine we would need a written agreement from the father to allow my wife to fly with the baby, but what about in the USA?






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When a mother travels with baby (2 years) without father, what documents she needs to have for baby? - Photo of Couple with a Baby Sitting.
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When a mother travels with baby (2 years) without father, what documents she needs to have for baby? - Photo of Man and Woman Having Fun With Their Baby





Can a child travel with just one parent?




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Images: Yan Krukov, Anastasiya Gepp, Andrea Piacquadio, Andrea Piacquadio