Is it possible to not be on the electoral register but receive a voting card before elections? Strange question I know, but Ive done a search and my details arent coming up, yet I received a voting card earlier this year (I didnt vote that time).
The register was updated in the past few months (someone called to my home about 2 months ago, fingal co co area) perhaps you had the same and have since been removed?
Register your details again with the authority if you wish to vote just to be sure