NOTE: In any Primary election in INDIANA, voters state which Party they are affiliated with by asking the poll workers for the ballot of that Party in a given Primary. A voter's party affiliation is determined solely by his or her Primary voting record; the state's voter registration form does NOT provide a place for the voter to state Party affiliation.

Even though the history of a voter's Party affiliation- solely as determined by the individual voter's Primary voting record- is part of the public record, the informaton is NOT available at the polling place. Any voter, however, may challenge another voter's Party affiliation at the polls:

In such a case, the voter making the challenge (the "challenger") fills out an affidavit that the voter being challenged (the "challengee") has not, in fact, voted in the Party's Primaries in the past, an assertion against which the challengee must fill out a counter-affidavit, asserting that they intend to vote for a majority of the candidates of the challengee's Party of choice in the next General Election. If the challengee fills out this counter-affidavit, the challengee is allowed to vote in the Primary; however, if the challengee refuses, he or she is not allowed to vote in the Primary.

Nevertheless, since General Election ballots are cast in secret, the intention expressed in the counter-affidavit by the challengee is impossible to enforce.

Indiana law forbids anyone from appearing on the general election ballot more the once.

The Libertarian Party nominates by convention rather than by primary.

Democratic and Republican Party nominations for Secretary of State, Auditor, and Treasurer are decided by convention.

A special election is required to be held under Indiana Code 3-10-8-1(3) "Whenever a vacancy occurs in the office of United States Representative, unless the vacancy occurs less than 74 days before a general election." There is no primary. Major party candidates are nominated at a party caucus and minor party and independent candidates are nominated by petition.

The party selects a nominee for Special Elections or in the event their nominee dies. The nominee "shall be filled by appointment by the district chairman of the political party."

2024 General Information from the Indiana Election Commission.