Thanks, Kerri, for the comment. It’s possible, as you say, that Brazil would regard service on the US counsel as improper, and that could come into play if the plaintiff sought recognition and enforcement of a judgment in Brazil. But since service on a US lawyer takes place in the United States, it’s difficult for me to see how Brazil could make a strong case that such service would offend its sovereignty, which is really a territorial notion.

Your references to the briefs and the argument lead me to think that you were involved in the case. If so, I’d be grateful for any other impressions you have!