§ Ind. Code § 3-7-13-13Voter identification number

(a) Except as provided in subsections (b) and (c), when an individual registers
to vote, the individual must provide the individual's driver's license number issued under
IC 9-24-11, as provided under 52 U.S.C. 21083.
(b) If an individual does not have a driver's license issued under IC 9-24-11, the
individual must provide the last four (4) digits of the individual's Social Security number
when the individual registers to vote, as provided under 52 U.S.C. 21083.
(c) As required under 52 U.S.C. 21083, if an individual does not have a Social Security
number, the election division shall assign the individual a number to be associated with the
individual's registration in the computerized list maintained under IC 3-7-26.3. If the
individual has an identification card number issued under IC 9-24-16, the election division
shall assign that number as the voter's number under this subsection. If the individual does
not have an identification card number issued under IC 9-24-16, the election division shall
assign a unique identifying number to the voter's registration record in the computerized list,
as provided under 52 U.S.C. 21083.
(d) The number provided by the individual under subsection (a) or (b), or the number
assigned to the individual under subsection (c), is the individual's voter identification number.
(e) A voter's voter identification number may not be changed unless:
(1) the voter made an error when providing the number when registering to vote;
(2) the election division or a county voter registration office made an error when