Venezuela uses electronic voting machines which register an elector's decision and then emit a printed receipt for the voter to deposit into a sealed ballot box.

BBC: Venezuela election vote to be audited

Mr Kane's parents said they wanted to ensure their son was kept on the electoral register because voting was a matter of citizenship.

BBC: NEWS | UK | Northern Ireland | Learning disabled 'vote difficulties'

Labour's rural development spokeswoman Karen Gillon also had concerns about the register and was concerned the franchise for voting for the Crofting Commission had not been extended to include more women.

BBC: Crofting Reform Bill debate part 2

On the state level, the party has gone all out to register and educate the one-fifth of the voting-age population that's Latino, and the presidential candidates have courted them.

NPR: Latino Vote Focus of Nevada's Democratic Primary

They even plan to make the July voting accessible on the Internet: any citizen can get free software to check the register of voters, and even to keep an eye on detailed results, which are planned to be updated every seven minutes.

ECONOMIST: Mexico

The voting age in Iraq is 18, but anybody born in 1991 will be allowed to register and submit signatures after January 1.

CNN: Attacks in Iraq kill 20 people

The Republicans argue that voting machines are more reliable than humans and that no ballot should count if it doesn't register in a machine tabulation.

CNN: The Legal Challenges