A vote that is not counted because the ballot paper has not been completed according to electoral law. Jj Kk Ll
A ballot paper which has not been marked correctly. In the ACT, examples of informal votes include: a ballot paper with no first preference a ballot paper with two or more first preferences a ballot paper where the name of the voter can be identified.
A ballot paper which has been incorrectly completed or not filled in at all. Informal votes are not counted towards any candidate but are set aside.