What country of birth to indicate when filling out an electronic permit to enter Mexico, if the USSR indicated in the passport

My husband and I are flying to Mexico. In the passport the place of birth is Primorsky Krai / USSR and Altai Krai / USSR.
In the graph the country of birth I indicated - RF.
Is it true? Will there be any questions from the staff of the Migration Service in Mexico?

Responds Milana Mitkina, the Russian Express company

You have all issued absolutely right! Problems and questions will not be.

Responds Julia Kazmina

No, there should not be any questions, since this is the territory of Russia. If you had another country listed in your passport, this would be a problem, and so - everything is in order. Be sure to fully match all the numbers in the passport with those that you entered on the site in the electronic authorization form.

October 22, 2013

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My husband and I are flying to Mexico. In the passport the place of birth is Primorsky Krai / USSR and Altai Krai / USSR. In the graph the country of birth I indicated - RF. Is it true? Will there be any questions from the staff of the Migration Service in Mexico?

My husband and I are flying to Mexico. In the passport the place of birth is Primorsky Krai / USSR and Altai Krai / USSR.
In the graph the country of birth I indicated - RF.
Is it true? Will there be any questions from the staff of the Migration Service in Mexico?