# Detect tampered and deepfake Hong Kong Identity Card > The Hong Kong Identity Card is the Immigration Department's credential for everyone lawfully resident in the territory, citizen or not, and permanent residents use it as a travel document between Hong Kong and Macao. Smart cards carry a card number with a computed check digit and a row of residency-status codes, so both the number and the status symbols are verifiable against the card's own structure. **Canonical URL:** https://tampercheck.ai/documents-support/hong_kong_id **API document class:** `hong_kong_id` --- ## What a genuine hong kong identity card contains The card number is one letter, six digits, and a check digit in parentheses, computed by the issuing algorithm. The front carries photograph, name in English and Chinese, date of birth, sex, and the status codes that encode residency rights, and a permanent resident's card carries no expiry while a non-permanent card expires with the holder's limit of stay. Hong Kong replaced its smart cards across a territory-wide exercise that finished in 2023, so two generations circulate and each has its own layout and security features. The status codes are the practical fraud surface, because upgrading a limited resident's card to show permanent residency is the edit with the highest payoff. ## How hong kong identity card forgeries are made ### Check-digit validation The digit in parentheses is a deterministic function of the card number's letter and digits. A failure marks a retyped or invented number, independent of print quality. ### Status-code coherence The code row encodes residency rights, and the symbols for permanent residency must agree with the card's expiry behaviour. A card showing permanent residency symbols while carrying an expiry date contradicts itself. ### Expiry rules Permanent residents' cards carry no expiry, while non-permanent cards expire with the limit of stay. An expiry on a card claiming permanence, or its absence on a limited stay, is a structural contradiction. ### Portrait patching Redirecting a legitimately issued card to a new holder means portrait substitution, which leaves cut-line edges and resolution steps around the photo window. ### Generation conformance Pre- and post-replacement card generations differ in layout and security printing, and mixing elements of both signals a card assembled rather than issued. ## What TamperCheck checks on a hong kong identity card TamperCheck runs 200+ forensic checks across three layers and returns a risk score from 0 to 100 with plain-English findings tied to specific regions of the document. These three carry the most weight on this document class. ### Portrait substitution and face-swap analysis The document is isolated from whatever it was photographed on, then the portrait region is assessed against the card surface around it. A pasted or generated face rarely matches the substrate it was placed onto. ### Security print, foil, and hologram analysis A genuine security overlay or guilloche background behaves differently from a printed picture of one. A reproduction loses the structure that made the feature a security feature in the first place, and that loss is measurable even when the copy looks convincing on screen. ### Date and validity consistency Issue, expiry, and period dates are checked against one another and against the file's own creation metadata, which catches backdating and validity extension. ### And many more checks The three above are the layers that carry the most weight on a hong kong identity card. Every upload runs the full suite of 200+ checks regardless of document class, spanning file structure and metadata, pixel-level forensics, font and text rendering, optical and print characteristics, provenance signals, AI-generation signatures, and many more checks. ## Who verifies a hong kong identity card, and why HK banks, telecom operators, and immigration officers. In each case the document is being used to unlock money, access, or a legal status, which is exactly what makes it worth forging. ## How to verify a hong kong identity card in 4 steps 1. **Photograph both sides.** Capture the card flat at full resolution, front and back, keeping the card number, check digit, and status code row sharp. 2. **Validate the number.** Apply the check-digit computation over the card number. A failure marks the number as retyped or invented. 3. **Read the status codes.** Weigh the residency codes against the expiry behaviour: permanence and an expiry date cannot both be true. 4. **Run a forensic check on the file.** Status-code edits are quiet work on a small card face. TamperCheck runs 200+ forensic checks spanning check-digit validation, status-code coherence, and portrait analysis, returning a risk score from 0 to 100 with findings tied to specific regions of the image. ## Frequently asked questions ### What do the symbols on a Hong Kong ID card mean? The code row encodes residency rights, including whether the holder has the right to land and what conditions attach to their stay. Because permanent residency is the highest-value status, symbol edits are the card's characteristic fraud, and the codes must cohere with the card's expiry behaviour. ### Do permanent residents' Hong Kong cards expire? No. Cards issued to permanent residents carry no expiry, while cards issued against a limit of stay expire with it. A card that shows permanent residency symbols and an expiry date contradicts its own rules. ### What does the digit in brackets on a Hong Kong ID mean? It is a check digit computed from the letter and six digits that precede it. Recomputing it is cheap and decisive: an invented or retyped number almost always fails the computation. ### How does TamperCheck verify a Hong Kong ID card? TamperCheck recomputes the check digit, weighs the status codes against the expiry behaviour, and inspects the portrait window for substitution traces. Results arrive within seconds as a risk score from 0 to 100, with findings tied to specific regions of the card. ## Related document types - TamperCheck Forensic Report: https://tampercheck.ai/documents-support/forensic_analysis_report - Unknown: https://tampercheck.ai/documents-support/unknown --- Try TamperCheck now: https://tampercheck.ai/dashboard · Docs: https://tampercheck.ai/docs · Pricing: https://tampercheck.ai/pricing