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Variations in Voter Identification Laws
Voter ID laws can be categorized in two ways. First, the laws can be sorted by whether the state asks for a photo ID or whether it accepts IDs without a photo as well. Second, the laws can be divided by what actions are available for voters who do not have ID. These two categorization schemes can and do overlap.

Photo vs. non-photo identification: Some states request or require voters to show an identification document that has a photo on it, such as a driver’s license, state-issued identification card, military ID, tribal ID, and many other forms of ID. Other states accept non-photo identification such as a bank statement with name and address or other document that does not necessarily have a photo. Using this categorization for laws that are in effect in 2020, 18 states ask for a photo ID (althought North Carolina's is on hold based on a preliminary injunction from a federal judge) and 17 states also accept non-photo IDs. (To see this difference, look at the columns in Table One.)

Procedures for when a voter does not have identification: If a voter fails to show the ID that is asked for by law, states provide alternatives. These laws fit two categories, non-strict and strict.

Non-strict: At least some voters without acceptable identification have an option to cast a ballot that will be counted without further action on the part of the voter. For instance, a voter may sign an affidavit of identity, or poll workers may be permitted to vouch for the voter. In some of the “non-strict” states (Colorado, Florida, Montana, Oklahoma, Rhode Island, Utah and Vermont), voters who do not show required identification may vote on a provisional ballot. After the close of Election Day, election officials will determine (via a signature check or other verification) whether the voter was eligible and registered, and therefore whether the provisional ballot should be counted. No action on the part of the voter is required. In New Hampshire, election officials will send a letter to anyone who signed a challenged voter affidavit because they did not show an ID, and these voters must return the mailing, confirming that they are indeed in residence as indicated on the affidavit.

Strict: Voters without acceptable identification must vote on a provisional ballot and also take additional steps after Election Day for it to be counted. For instance, the voter may be required to return to an election office within a few days after the election and present an acceptable ID to have the provisional ballot counted. If the voter does not come back to show ID, the provisional ballot is not counted.