TORONTO -- Canada Post says it is late in delivering about half a million voter cards one week before the provincial election.
The Crown corporation says all voter cards in its system are expected to be out for delivery as of the end of Thursday.
It says it experienced a "mechanized process failure" and additional resources are in place to sort the last batch of voter cards manually.
Canada Post says about 8.5 million cards have already been delivered successfully.
The cards tell voters where, when and how to vote, and Elections Ontario says they were supposed to be delivered by Friday, in time for advance polls opening Saturday.
It says voters who haven't received their card can still cast their ballot by bringing one piece of identification that shows both their name and current residential address.
"We rely on our partnership with Canada Post to deliver essential voter information on time," Greg Essensa, Ontario's chief electoral officer, said in a statement. "We are clearly disappointed that we have not received the level of service that we have come to expect from our long-standing partner."
Meanwhile, Canada Post apologized and said it is investigating the cause of the processing failure that caused the delay.
"Canada Post is proud to deliver Voter ID cards for elections across the country," spokesman Phil Legault in a statement. "We apologize to Elections Ontario and to anyone who has yet to receive their Voter ID card for any delay."
Ontario goes to the polls June 7.