UID vs EID: The Difference Between Aadhaar Number and Enrolment ID
UID usually refers to the 12-digit Aadhaar number assigned after successful Aadhaar generation. EID is the enrolment reference created when an enrolment is submitted and is used in enrolment and status-related journeys.
Independent website: Do not post your UID/Aadhaar number or EID publicly. Use UIDAI’s official services when an identifier is required.
Use this summary before taking action.
UID and EID at a Glance
| Identifier | What it is | Common use |
|---|---|---|
| UID / Aadhaar number | Shows the Aadhaar number as provided in the standard UIDAI e-Aadhaar. | Used for Aadhaar services and authentication where Aadhaar-number use is appropriate. |
| EID / Enrolment ID | Hides the first eight digits and shows only the last four digits of the Aadhaar number. | Used for enrolment status and other UIDAI flows that accept the enrolment reference. |
Where Do You Find the EID?
Keep the acknowledgement: UIDAI documents a 28-digit EID made from the enrolment number and date/time stamp in relevant enrolment journeys. Do not publish the acknowledgement online.
Which Identifier Should You Use?
Checking enrolment status
Use the enrolment or status identifier the UIDAI service asks for.
Downloading Aadhaar
UIDAI’s e-Aadhaar service accepts Aadhaar number, Enrolment Number or VID.
Recovering a lost identifier
UIDAI provides official Retrieve UID/EID options when you no longer have the number or reference.
Treat Both Identifiers Carefully
Official Sources Used
UIDAI — About Your Aadhaar
UIDAI — Enrolment & Update FAQ
UIDAI — e-Aadhaar FAQ
Use the Identifier the UIDAI Service Requests
UID and EID serve different stages of the Aadhaar journey. Keep both private and use official UIDAI routes for status, download or recovery.