Electoral system
Electoral rules place limits on suffrage and candidacy. Most countries's electorates are characterised by universal suffrage, but there are differences on the age at which people are allowed to vote, with the youngest being 16 and the oldest 21 (although voters must be 25 to vote in Senate elections in Italy). People may be disenfranchised for a range of reasons, such as being a serving prisoner, being declared bankrupt, having committed certain crimes or being a serving member of the armed forces. Similar limits are placed on candidacy (also known as passive suffrage), and in many cases the age limit for candidates is higher than the voting age. A total of 21 countries have compulsory voting, although in some there is an upper age limit on enforcement of the law. Many countries also have the none of the above option on their ballot papers.
Electoral fraud
Voter intimidation involves putting undue pressure on a voter or group of voters so that they will vote a particular way, or not at all. Absentee and other remote voting can be more open to some forms of intimidation as the voter does not have the protection and privacy of the polling location. Intimidation can take a range of forms including verbal, physical, or coercion. This was so common that in 1887, a Kansas Supreme Court in "New Perspectives on Election Fraud in The Gilded Age" said “[…] physical retaliation constituted only a slight disturbance and would not vitiate an election.”Vote buying occurs when a political party or candidate seeks to buy the vote of a voter in an upcoming election. Vote buying can take various forms such as a monetary exchange, as well as an exchange for necessary goods or services. This practice is often used to incentivise or persuade voters to turn out to elections and vote in a particular way. Despite the fact that this practice is illegal in many countries such as the United States, Argentina, Mexico, Kenya and Nigeria, its prevalence remains worldwide.