Hong Kong's Duplicate Image Problem: Why Sloppy Digital Records Are Costing Residents Time and Money

A recurring flaw in Hong Kong's digital infrastructure is drawing fresh scrutiny: duplicate images — identical or near-identical photographs and scanned documents appearing multiple times across government portals, property databases, and social services platforms — are slowing down application processing, inflating storage costs, and in some cases causing residents to receive incorrect information about properties or benefit entitlements.

The issue is not trivial. Hong Kong's accelerating push toward e-government, anchored by the iAM Smart platform rolled out from 2021 and now boasting more than 3.5 million registered users, has funnelled an enormous volume of document uploads, identity scans, and supporting photographs into centralised systems. When deduplication protocols are absent or poorly maintained, the same image can sit in multiple records simultaneously — creating administrative confusion that hits hardest at the point of approval.

Where the Problem Shows Up

Talk to anyone who has recently applied for public rental housing through the Housing Authority's online portal and you will hear a familiar story. Applicants submitting household registration photographs or floor-plan images report receiving rejection notices citing mismatched records, only to discover that an earlier submission — sometimes months old — is still sitting in the system flagged as the primary file. The Housing Authority's waiting list currently stands at over 210,000 applicants, according to figures the authority published in early 2026, meaning even marginal processing delays compound across a vast number of families.

Estate agencies operating out of Mong Kok's Fa Yuen Street corridor and along Nathan Road in Yau Ma Tei have also felt the pinch. Listings aggregated on property portals like Midland Realty and Centaline often carry duplicate listing photographs — sometimes the same unit appearing under two different reference numbers with slightly different prices. For buyers in a market where a 300-square-foot flat in Sham Shui Po can still command upward of HK$3 million, the confusion over which listing reflects the current asking price matters enormously.

The Hong Kong Public Libraries system, operated under the Leisure and Cultural Services Department, encountered a related problem in 2025 when a digitisation drive covering historical photographs from the Central Library on Causeway Bay's Victoria Park Road generated hundreds of duplicate catalogue entries. Staff had to manually review and collapse records — work that consumed roughly six weeks of cataloguing time, according to internal departmental timelines reported by local media at the time.

What Needs to Happen — and What Residents Can Do Now

The fix, technically speaking, is not mysterious. Perceptual hashing — a method that generates a fingerprint for each image and flags near-identical files before they are stored — has been standard practice at large content platforms globally for years. The question is whether Hong Kong's government bureaux and private-sector platforms invest in retrofitting existing databases, not just new uploads.

The Office of the Government Chief Information Officer has outlined digital infrastructure standards under the Digital Government Blueprint 2.0, a policy framework updated in 2024, but critics in the IT sector argue implementation timelines for legacy data cleaning remain vague. Residents affected by duplicate-image errors in their own records have a practical recourse: the Office of the Privacy Commissioner for Personal Data, located in Sunlight Tower on Wan Chai's Hennessy Road, handles complaints related to inaccurate personal data held by both public bodies and private companies under the Personal Data (Privacy) Ordinance. Filing a formal correction request under that ordinance — specifically under Data Protection Principle 4 — puts a legal obligation on the data holder to respond within 40 days.

For property searches, cross-checking listings across at least two independent platforms before making any offer remains the most reliable short-term safeguard. The Land Registry's IRIS online search service, updated in real time, remains the authoritative source for ownership and transaction records and should be the final verification step for any serious buyer.

The broader lesson is that digital transformation without disciplined data hygiene creates its own category of bureaucratic drag — one that falls disproportionately on residents with the least margin for error: housing applicants, low-income benefit claimants, and small landlords. Getting this right is less a technical challenge than a governance priority.