Could you tell me what else I can do, since my children will receive their sacraments, but one of the godparents, knows that it is confirmed, but he does not have how to prove it, since they cannot go where they confirmed it, and he is here in USES.

What does the letter have to specify to verify that it was confirmed?

He and my husband were baptized on the same day and he is the same godfather for both of us and my husband's brother is the one who will be the godfather, and he is coming from Ohio.

The father said that with any kind of verification, even a photo or a letter from someone who knows that it is true that he made the confirmation.