Updated for 2026 · For Tamil Nadu residents. Confirm current steps on the official e-Sevai portal.
- CAN = Citizen Access Number — a one-time, lifetime ID.
- Needed before applying for any e-Sevai certificate.
- Create it on tnesevai.tn.gov.in — sign up, then CAN registration.
- Aadhaar is optional for registration.
- The same CAN is reused for all services — register once.
What a CAN is, and why you need it first
If you've read our guides on the income certificate, community certificate or first graduate certificate, you'll have seen the same instruction: "log in with your CAN." The CAN — Citizen Access Number — is a unique ID that stores your KYC (name, address, contact) in the Tamil Nadu e-Sevai database. It's the key that unlocks every e-Sevai service: without a CAN you can't apply for a certificate online. The good news is you create it once, and it lasts a lifetime.
Two things people confuse
| Item | What it is |
|---|---|
| e-Sevai login (user ID + password) | Your account to sign in to the portal |
| CAN (Citizen Access Number) | Your KYC profile ID used to apply for services |
You first sign up for a login, then, after logging in, you register your CAN. Both are one-time steps; after that you simply log in and apply.
How to register your CAN — step by step
- Go to tnesevai.tn.gov.in and click Citizen Login → New user / Sign up.
- Create a user ID and password, set a security question, and verify your mobile with an OTP.
- Log in with your new credentials.
- Choose CAN Registration and enter your personal and address details (Aadhaar optional).
- Confirm with the OTP; the portal displays your Citizen Access Number — note it down.
That's it — you now have a CAN valid for life, ready to use for any e-Sevai application.
What you can do once you have a CAN
With a CAN, you can log in and apply for the full range of Revenue-Department and other services, including:
- Income certificate
- Community certificate
- Nativity certificate
- First graduate certificate
- Legal heir (Varisu) certificate
- OBC / other certificates and many department services
Tips and common issues
- Mobile number: use a number you'll keep — it's tied to your OTPs and account recovery.
- One CAN per person: don't register multiple CANs; reuse your single number.
- Save the CAN safely: note it with your important documents so you don't have to recover it later.
- No Aadhaar? You can still register, but keep alternative ID/address proof ready for the specific service.
- Prefer offline? Any e-Sevai / CSC centre can create the CAN and file services for you.
What if you forget your CAN or login?
Because you'll use the CAN across many years and services, it's worth knowing recovery. If you forget your CAN, you can retrieve it on the portal using your registered mobile/OTP or your details; if you forget your login password, use the "forgot password" option, which sends a reset link/OTP to your registered contact. This is exactly why the mobile number you register matters — keep it active, because it's the anchor for both OTP verification and account recovery. If you ever change your number, update it on the portal so you don't get locked out before an urgent certificate application.
Online vs at an e-Sevai centre
| Route | Best for |
|---|---|
| Self-service (online) | Anyone comfortable filling forms and uploading scans |
| e-Sevai / CSC centre | Those who'd rather have an operator create the CAN and file services |
Both create the same lifetime CAN. If you go to a centre, the operator registers your CAN and can immediately file the certificate you need in one visit — useful if you don't have a scanner or want help with the documents. Either way, once the CAN exists, future applications are just a login away.
Related Tamil Nadu guides
Ready to apply? Start with the income certificate and community certificate guides, or the first graduate certificate. Each begins with logging in using the CAN you just created.
Frequently asked questions
What is a CAN?
Citizen Access Number — a lifetime KYC ID needed to apply for e-Sevai services.
How do I register?
Sign up on tnesevai.tn.gov.in, log in, choose CAN registration, enter details, verify OTP.
Is Aadhaar mandatory?
No — you can register without it, though it makes verification easier.
Is the CAN valid for life?
Yes — register once and reuse it for all services.
About ComplyKraft. Built by Dinesh Kumar S in Chennai — B.Sc. Mathematics, M.Sc. IT. Plain-language guides and free tools for Tamil Nadu.
Disclaimer: Informational guide, updated 2026. e-Sevai registration steps are set by the Government of Tamil Nadu and can change — confirm at tnesevai.tn.gov.in.