Data Matching

Annual Report

Purpose: To compare the citizenship register with the electoral roll so that people who are qualified to vote but have not enrolled may be invited to enrol.

Year commenced: 2002

Features: Data transferred on request by CD.

DIA Citizenship disclosure to EEC: Citizenship provides full name, date of birth and residential address of new citizens aged 17 years and over (by grant or by descent).

2011/12 activity:

Match runs 4
Records received for matching 71,971
Invitations to enrol sent out 788
Presumed delivered 774
New enrolments 104
Percentage of letters delivered resulting in changes 15%
No response 670
Cost $920
Average cost per enrolment $8.85

Commentary: The figure for 'Records received for matching' is significantly higher than the figure reported in 2010/11 (10,600), because it includes any name changes and alternate names.

Compliance: Compliant.

Technical information

Information matching provision Electoral Act 1993, s.263B(3)(d)
Year authorised/commenced 2002/2002
Programme type Identifying unclaimed entitlement

System description

EEC operates a set of five programmes designed to identify people who are eligible to vote but are not on the electoral roll (or whose enrolment details need updating). Those who are 17 years old are invited to enrol provisionally, in anticipation of when they turn 18. These programmes are:

  • NZTA/EEC Unenrolled Voters Programme
  • MoT/EEC Unenrolled Voters Programme
  • MSD/EEC Unenrolled Voters Programme (beneficiaries and students)
  • DIA(Passports)/EEC Unenrolled Voters Programme
  • Citizenship/EEC Unenrolled Voters Programme.

The files received are processed together in a sequence (NZTA then MoT, MSD (Benefits), Passports, MSD (Student Loans) and finally Citizenship) intended to maximise the benefits from each run.

NZTA ⇾ MoT ⇾ MSD (Benefits) ⇾ Passports ⇾ MSD (Student) ⇾ Citizenship

The process for each of the matches is essentially the same.

1. The source agency creates an encrypted file extract from its records of people aged 17 and over who supplied their details in the period covered by the extract. Each extract includes full name, date of birth, address(es) and the date the record was last updated. This file is picked-up by EEC staff.

2. EEC matches each extract with the electoral database on the basis of surname, given name/s and date of birth.

3. The addresses for matched records are compared and if the addresses are the same, the records received for matching are deleted since the EEC's records are, in effect, confirmed as current and no further action is needed.

4. Where the addresses differ, the 'update dates' are compared as EEC need the most recent address. If the 'update date' from the source agency[1] is later than the 'update date' from the electoral roll record, and the EEC does not have that address for that elector in their history, the details are saved to a correspondence file of individuals to be sent an invitation to update their details.

5. Random samples of 'possibly matched' records are examined manually to establish whether or not they should be regarded as matched. Where records appear to match, the process detailed in the previous paragraph is followed.

6. 'Not matched' records are saved to the correspondence file of individuals to be sent an invitation to enrol.

7. Before any invitation letters are generated, the correspondence file is sorted to eliminate duplicates. This internal check ensures that when a client record appears in more than one source agency file, only the first such record identified is used to generate a letter to the client. This prevents EEC from sending multiple invitations to an individual. EEC also maintains a record of information sent to it by the Registrar of Births, Deaths, and Marriages about deaths within the past five years. This is used to ensure that data matching correspondence is not sent to anyone who has died.

8. Records from the correspondence database are deleted when the electoral roll is updated for that elector, when EEC receives notice of death or other special circumstances requiring that the person not be contacted again, or when it receives a 'gone no address' response that is not contradicted by more recent information.

The 'no response' category for these four matches differs from other programmes in that no further action is taken in these matches if there is no response received. Non-response is not seen as a form of agreement and this programme requires a positive 'opt-in' response.

Historical activity

  2005/06 2006/07 2007/08 2008/09 2009/10 2010/11
Match runs 2 2 3 4 5 2
Records compared 28,862 32,569 27,616 25,138 18,232 10,600
Invitations to enrol/update sent out 1,609 1,489 1,424 1,316 810 437
Presumed delivered 1,538 1,426 1,359 1,281 796 427
Enrolments (new) 360 271 299 252 106 64
Percentage of enrolments resulting from letters
delivered
23% 19% 22% 20% 13% 15%
No response 1,178 1,155 1,060 1,029 690 363
Cost $1,604 $1,636 $1,886 $4,171.98 $1,866.92 $587.02
Average cost per enrolment $4.46 $6.04 $6.31 $16.56 $17.61 $9.17

[1] The 'update date' supplied by the agency may be the last date the record was updated in any form, and does not necessarily relate to an updated address.