O/I

English Law/Patents Law (general) Court record

DEFENDANT APPEARS Represented By: MR (lawyer''s name) O/I MR (another lawyer's name)

What does O/I stand for?

B D Finch Mar 27, 2017: What sort of document? This looks remarkably like the standard symbol for "on/off", but that would only be likely if this were an informal note, rather than an official document.
Cheung00 (asker) Mar 27, 2017: The court told me it means the first lawyer is representing on behalf of the second.
Port City Mar 26, 2017: You could ask either of the lawyers named or the law society. (There is no guarantee they would answer your query, though.)
Lingua 5B Mar 26, 2017: Depending on context could it be Ombudsman Institution?