Delhi's War on Duplicate Images in Public Records: How the Capital Stacks Up Against London, Seoul and Lagos

Delhi's Municipal Corporation formally escalated its duplicate-image purge programme in May 2026, directing all 12 zonal offices to cross-check photographs held in the Unified Citizen Services database against the Aadhaar-linked biometric records maintained by the Ministry of Electronics and Information Technology. The exercise, which covers roughly 3.2 million citizen service files spanning ration cards, property tax accounts and voter rolls, is the most systematic attempt the capital has made to clean its visual records since the 2019 digitisation push that first exposed the scale of the duplication problem.

The timing matters. Delhi is three months from a fresh round of property tax reassessments under the MCG's revised Circle Rate framework, and duplicate or mismatched ID photographs have historically allowed the same individual to file objections under multiple identities, jamming the East Delhi Tax Tribunal's docket and delaying revenue collection. Separately, the Delhi Metro Rail Corporation is building out Phase 4 corridors toward Janakpuri West and Tughlakabad, requiring fresh land-acquisition rolls that depend on clean photographic identity records to disburse compensation to the right claimants.

Where Delhi Stands Against Peer Cities

London's Government Digital Service completed a similar deduplication sweep of its London Resident Services portal in 2023, cutting approximately 11 percent of duplicate photographic entries from its roughly 4.8 million-record Housing Benefit database within eight months. Seoul's Smart City Operations Centre, based in the Mapo district, has used AI-assisted perceptual hashing since 2021 to flag near-duplicate images in its integrated civil affairs system, reporting a residual duplication rate it described publicly as below two percent by 2024. Lagos, operating under the Lagos State Residents Registration Agency framework, launched a comparable exercise in February 2025 but has publicly acknowledged that limited broadband access across Alimosho and Badagry local government areas has slowed the rollout considerably.

Delhi's own numbers are harder to pin down with precision. The MCG has not published a mid-programme audit. What is on record, through a Right to Information response obtained by the Delhi-based digital rights group Internet Freedom Foundation in April 2026, is that the zonal offices in Shahdara and South Delhi had together processed just under 40 percent of their assigned file batches as of 31 March. At that pace, the full 3.2 million-record sweep would not be complete before the first quarter of 2027, putting Delhi behind both London's 2023 timeline and Seoul's 2021 rollout on a like-for-like basis.

The technology gap is part of the story. Chandni Chowk's ward offices and the older South Delhi Municipal Corporation buildings in Lajpat Nagar still run a patchwork of legacy terminals that cannot natively communicate with the MEITY biometric API without a manual export step. That step introduces delay and, ironically, fresh opportunity for human error in the very records the programme is designed to clean. The DMRC, which is running its own parallel deduplication effort for Phase 4 land records, procured a dedicated image-matching engine from a Bengaluru-based vendor in November 2025 and is reportedly moving faster than the MCG zonal offices, though the corporation has not published comparative figures.

What Residents and Claimants Should Do Now

Citizens with pending property tax objections at the East Delhi Tax Tribunal on Vikas Marg, or active land-acquisition compensation claims along the Phase 4 Janakpuri West corridor, should verify that their Aadhaar-linked photograph and their MCG service file photograph match exactly — same image, same version — before submitting documents this cycle. Even a minor discrepancy, such as a scanned copy of an older photograph versus the current Aadhaar biometric, is enough to trigger a manual hold under the new deduplication protocol, potentially delaying resolution by several months.

The MCG has opened a dedicated helpdesk at its headquarters on S.P. Mukherjee Civic Centre, Connaught Place, where residents can request a side-by-side comparison report at no charge. The window is open Monday through Saturday, 10 a.m. to 4 p.m. The deadline to resolve flagged mismatches ahead of the October reassessment cycle is 15 September 2026. For a city still chasing Seoul's benchmark, that deadline is the more immediate pressure than any global comparison chart.