Please tell me, we are flying with my son to Phuket, my son (5 years old) has a passport. Do I need a birth certificate and its translation? And where will they be needed?

[Svetlana]

Please tell me, we are flying with my son to Phuket, my son (5 years old) has a passport. Do I need a birth certificate and its translation? And where will they be needed?

[Olga]

On the passage of the Russian border, on departure, they may ask, nowhere else.