There is a proposal to inform users about their eligibility to vote in the upcoming Arbitration Committee elections here:

https://en.wikipedia.org/wiki/Wikipedia:Administrators'_noticeboard#Enfranchising_voters_in_arbcom_elections

I seem to remember some hard feelings last year when some users were notified that they were eligible and were later disqualified.

FYI, the information page for the current election is at WP:ACE
https://en.wikipedia.org/wiki/Wikipedia:Arbitration_Committee_Elections_December_2015