Corrected ones to be sent on Friday
Onchan Commissioners will send out new polling cards on Friday, after the ones posted today contained multiple errors.
It's ahead of the by-election due to be held next Thursday (22 Oct) between candidates Kim Corlett and David Quirk.
The local authority has asked voters to disregard the inaccurate cards and wait for the new ones to arrive by the end of the week.
It says an update on the mistake will be provided 'once the facts have been established'.
Posting polling cards costs thousands of pounds, and is one of the biggest areas of expenditure in any election.