Stop in for a cup of coffee

I got this little note from the Ca DMV in the mail. Seems when I renewed my DL last fall the Feds wanted me to get their approved ID also. At that time DMV says to bring 1 proof of residency (utility bill, credit card bill type proof) so I did. Got the new DL with Fed approval, or so I thought. Turns out the Feds require 2 proof of residency documents. The new note said "Is this your address? If so check this box". X in the box it gets. "Sign below, this will be your second proof of residency. Return in the post paid envelope." I'm sure the cost of their mistake will be passed on to me in some way in the near future. Better than wasting another day at DMV to rectify their error.