What is the proper etiquette for responding to a distant relative that is graduating out of state from law school?

A simple card with congratulations and good wishes is fine in my opinion. We've done this for graduations out of state that we were unable to attend. Others will chime in here with agreement or differing opinions and suggestions, so check back.

RSVP that you are unable to attend and send a nice 'congratulations on your graduation' card is appropriate.