In its October "Energy at Home" newsletter, PECO encouraged its customers to vote on November 6th.
But the newsletter also featured an article about the now-suspended voter ID law, reminding customers to bring proper identification to the polls.
PECO says the letter was printed and mailed to 210,000 homes before a judge blocked the law from going into effect.
PECO is now working to get the up-to-date information out to its customers in the form of a clarification letter that should arrive before Election Day.