Hesychios:
In times past there have been cases where the Catholic school would try to force the children to undergo all of the ceremonial with their classmates, and some teachers would resist the explanations coming from parents.
+T+
Michael
All three of my children were baptized and chrismated (confirmed) in the Byzantine Catholic Church, but received their formal religious education through our local Latin Catholic Church. It did, in fact, require a bit of explaining on our part to convince their respective RE instructors that they had actually been confirmed as infants and could not receive the sacrament a second time.
With regard to my two older children (now 24 and 22), they participated in all of the confirmation preparations and, indeed, in the ceremony itself, with the rest of their classmates. In each case I spoke to the confirming bishop beforehand to alert him to the fact that they were Eastern Catholic children, already confirmed. Rather than “re-confirm” them as they approached, he gave them his blessing instead.
With regard to our youngest child (now 15), we, once again, had to do some heavy-duty convincing of his teachers that he had, indeed, already received the sacrament. This time, however, we opted to forego his participation in the preparations for the sacrament that the rest of the class did and in the ceremony itself, since we decided not to perpetuate a view of this sacrament that conflicted with those of our own particular Church sui iuris and, in fact, with our own personal beliefs regarding the sacrament. We instead impressed upon him, on our own, the fact that his initiation into the Church was already complete, whereas that of his Latin classmates was not.