Anyway - next step for everyone is pretty obvious, irrespective. Find out precisely what his lawyer is claiming his stance is
In order to do that, you already have to identify yourself, and some could not like it as a start.
No you don't.
"If you have any questions or concerns, please address these to the law offices at the following e-mail or mailing address."
Rather obviously you want your questions and concerns addressed BEFORE you submit the requested information - would be a bit late afterwards.