What does the HUID number on hallmarked gold mean?
HUID is a six-character alphanumeric code unique to each hallmarked gold piece. It can be checked in the BIS CARE app.
HUID stands for Hallmark Unique Identification. The code identifies an individual hallmarked piece of gold.
HUID has been mandatory for hallmarked gold since 2021. You can check the code in the BIS CARE app.
In short
- HUID is a six-character alphanumeric code.
- Each hallmarked piece has a unique HUID.
- The code can be checked in the BIS CARE app.
Sources
Last reviewed 27 September 2026 by the AIB desk.
