A voter ID law is a law that requires a person to show some form of identification on election day. In many jurisdictions requiring voter IDs (such as New Hampshire), voters who do not have photo ID often must sign a Challenged Voter Affidavit in order to receive a ballot to vote.
Voters identify themselves by their ID cards and are given the full number of ballot papers for the constituency plus a blank ballot paper and an empty envelope.
In Argentina voting is compulsory for all citizens between 18 and 70 years old, non-compulsory for those older than 70 and between 16 and 18, and citizens with domiciles in foreign countries. To vote they must present a valid Documento Nacional de Identidad at the corresponding voting center.
Most countries in Latin America have similar policies.
In Australia voting is considered compulsory for all adult citizens, although it is not compulsory to be registered on the electoral roll and is therefore difficult to enforce. Voting is only enforceable for those on the roll. Failure to cast a ballot may result in a small fine, currently AU$20.
No form of ID is required to cast a ballot at an election; instead, voters are asked three questions before being issued a ballot, so that they can be checked off the electoral roll: (1) what is your full name; (2) where do you live; and (3) have you voted before in this election? On election day, voters can vote at any polling place in their state of residence, and at selected polling places in other states.
In Brazil voting is compulsory to all citizens between 18 and 70 years old. To vote, all citizens must:
Since 2006 the Brazilian Electoral Justice is re-registering voters with biometric identification. In the 2014 elections more than 22 million voters out of 141 million will be identified by fingerprints.
In Canada, the Federal government mails an Elections Canada registration confirmation card, which the voter takes to the polling station. The card tells the individual where and when to vote. Voters must prove their identity and address with one of three options:
However, in some provinces[which?] a voter must establish their identity by presenting a health insurance card, driver's license, Canadian passport, certificate of Indian status, or a Canadian Forces ID card. These are all photo IDs.
In France, you have to prove your identity to vote: at the registration (proof of address --A phone, water or electricity invoice...-- and an identity document that prove your nationality --National Identity Card or Passport-- and the day of the vote, in town larger than 1000 inhabitants, an identity document is required.
Germany uses a community-based resident registration system. Everyone eligible to vote receives a personal polling notification by mail, some weeks before the election. The notification indicates the voter's precinct polling station. Voters must present their polling notification and if asked a piece of photo ID (identity card (compulsory in Germany), passport, form of identification). As a rule identification is not required other than by the polling notification. If the voter cannot present the notification, a valid ID and an entry in the register of voters can qualify for voting.
Voting is voluntary for all citizens 18 years or older. All voters must present photo ID before being allowed to vote. To prevent double-voting fraud, every voter is checked against the national voter database before their ballot is placed into the ballot box.
The Indian voter ID card is an identity document issued by the Election Commission of India to adult domiciles of India who have reached the age of 18, which primarily serves as an identity proof for Indian citizens while casting their ballot in the country's municipal, state, and national elections. It also serves as general identity, address, and age proof for other purposes such as buying a mobile phone SIM card or applying for a passport. It also serves as a Travel Document to travel to Nepal and Bhutan by Land or Air  It is also known as Electoral Photo ID Card (EPIC). It was first introduced in 1993 during the tenure of the Chief Election Commissioner TN Seshan. There are 11 other types of alternative identification documents specified that can be accepted for voting 
Similar to Germany, there is a national voters database and photo ID is required (identity card, passport or driving license).
Italy have ID cards, which you present when voting.
In Mexico voting is a voluntary right and is exercised protected by secrecy. Electoral laws are created by the federal government through the INE: National Electoral Institute (formerly IFE: Instituto Nacional Electoral 1990-2014). A free photo ID or elector's card is issued by right to all citizens of Mexico over 18, but sometimes months prior. Being allowed to commence paperwork before turning 18 is decided upon the day and month of birth, and how it plays in the current year's electoral calendar, as the institute suspends all new registries several months prior to any election. This action allows young Mexicans turning 18 within an inactive period to still enroll and guarantee their right to participate in the coming election. Full legal age in Mexico is 18 for both born and naturalized citizens. The voting ID card was introduced in 1990 by the now inactive IFE as a tool to "properly identify electors in a country with a history of voters casting multiple ballots and curious vote counts resulting in charges of fraud." After 2014 the IFE was deemed permanently inactive due to minor constitutional reforms, therefore the INE was simultaneously created. Although both institutes carry out almost exactly the same tasks and duties, this change allowed for yet further homogenization of elections in the country and opening way to what many Mexicans and members of the international community call the first ever legal elections in the country, in 2017. The INE elector's card is currently used in Mexico as the main mean of age and identity validation for legal, commercial and financial purposes, making this a vital document for all Mexicans over the age of 18, and consequently broadening the chance for more citizens participating on election day.
The registration office of each municipality in the Netherlands maintains a registration of all residents. Every eligible voter receives a personal polling notification by mail some weeks before the election, indicating the polling station of the voter's precinct. Voters must present their polling notification and a piece of photo ID (passport, identity card, or drivers license (a passport or ID is compulsory from the age of 14)). Such photo ID may be expired but not by more than five years.
Voting in Norway is voluntary for citizens 18 years or older (16 in some municipalities). Every person who is eligible to vote are sent a polling card in the mail a while before the election. The polling card recommends the closest voting location to you, but you are not required to vote there, but you are required to vote within your municipality. The polling card contains the date(s) of the election, opening times of polling locations and information on how to vote. While it is not mandatory to bring the polling card on the day(s) of the election, it generally makes the process smoother. However, a photographic ID, such as a passport or a driver's license, is required to vote. During the election day after you pick your party, you present your photographic ID and optionally your poll card to the poll attendants who verifies the information against a database, and record that you have voted.
When physically voting on election day, every voter must provide a valid identification document (such as a passport, drivers license, or an ID card from the Swedish Tax Agency). If a voter is missing valid identification, another person with valid ID-documents can certify the identity of the documentless voter.
In Swiss cantons (i.e. the subnational political level in Switzerland) that still use the Landsgemeinde or cantonal assembly; Historically, or in Appenzell until the admission of women, the only proof of citizenship necessary for men to enter the voting area was to show their ceremonial sword or Swiss military sidearm (bayonet); this gave proof that you were a freeman allowed to bear arms and to vote. Women, and men who choose to do so, may show their voting card instead.
There is currently no requirement to have identification to vote in elections in England, Scotland and Wales, before any election all eligible voters are sent a Poll card by their local authority although it is not a requirement to be in possession of a Poll card to vote.
A trial was held for the 2018 United Kingdom local elections - voters in 5 local authorities in England (Bromley, Gosport, Swindon, Watford and Woking) were required to show ID before voting as part of a pilot program to combat Electoral fraud. The legal basis for the trial has been contested.
The Twenty-fourth Amendment to the United States Constitution prohibits the conditioning of the right to vote in federal elections on payment of a poll tax or other types of tax. However, many states have some form of voter ID requirement, which have been allowed to stand by the Supreme Court. Only seven states have a strict requirement for a photo ID, unlike almost every industrialized nation around the globe.