Canada no longer issues replacement plastic SIN cards — and has not since March 31, 2014. If you lost an old SIN card, you cannot get a new one.
What you can get is a Confirmation of SIN (a letter confirming your existing number), but even that is only necessary if you have genuinely lost track of your SIN and cannot find it through other records. Service Canada is explicit:
If you lose or damage a SIN card but still know the number, you don't need to take any action. The right response depends entirely on what happened. Let's explore the following things in this article:
- How to find your SIN if you have lost it
- What to do if your SIN was stolen or exposed
- When (and whether) you can get a new SIN number
- Why Canada stopped issuing SIN cards
- How to get a Confirmation of SIN
TLDR: lost SIN card at a glance
Here is the quick reference.
| Feature | Detail |
|---|---|
| Can you get a replacement SIN card? | No — plastic SIN cards were discontinued March 31, 2014 |
| Do you need one? | No — the number itself is what you need, not the card |
| If you still know your SIN | No action required |
| If you cannot find your SIN | Check T4s, tax returns, MSCA, or request a Confirmation of SIN |
| If stolen/exposed | Monitor credit, file report with Canadian Anti-Fraud Centre |
| Can you get a new SIN number? | Only with clear evidence of fraudulent use (not guaranteed) |
| Fee | No fee for any SIN service |
Does Canada still issue physical SIN cards?
No. Service Canada stopped producing plastic SIN cards on March 31, 2014.
Since then, people who apply for or receive a SIN get a Confirmation of SIN — a paper letter or electronic confirmation containing the number. Existing old plastic cards are still valid if someone has one, but no replacements are issued.
The keyword "SIN card replacement" reflects an outdated understanding of the system.
What most people searching for this term actually need is either their existing number (which they may have misplaced) or a Confirmation of SIN (which is a document confirming the number, not a new card).
What should you do if you lost your SIN card but remember the number?
Nothing. Service Canada's guidance is straightforward — if you know your SIN, losing the physical card or letter does not require any action.
The SIN itself (the nine-digit number) is what employers, financial institutions, and government programs need. The card or letter was always just a record of that number.
Continue using your SIN as you normally would.
There is no legal or regulatory requirement to possess a physical card or letter, and protecting the number itself is what counts — not the format it was printed on.
How can you find your SIN if you cannot remember it?
Several common records contain the SIN, and checking them is faster than contacting Service Canada.
- T4 slips from any employer
- Notice of Assessment from CRA
- T5 slips from financial institutions
- RRSP, TFSA, or RESP contribution receipts
- CRA My Account — accessible with verified identity
- Previous year's tax return (line 10400 or the top of the return)
- My Service Canada Account (MSCA) — the SIN is displayed after login
If none of these records is available, Service Canada can confirm the existing SIN through an in-person visit to a Service Canada Centre (with identity documents) or through an online or mail application.
For newcomers who received their SIN when moving to Canada and may not have accumulated years of Canadian tax records, the MSCA login is often the fastest route.
How do you get a Confirmation of SIN?
A Confirmation of SIN is a document (letter or electronic confirmation) that states your existing SIN. Anyone who cannot locate their number through other records can get one.
Required documents
Service Canada requires identity and status documentation to confirm a SIN.
- A primary identity/status document (Canadian birth certificate, citizenship certificate, PR card, COPR, or valid work/study permit)
- A secondary identity document (Canadian or foreign passport, driver's licence, provincial ID)
For online applications, clear digital copies are needed. For in-person or mail applications, original documents are required. There is no fee for this service.
What should you do if your SIN was stolen or exposed?
A stolen SIN is more serious than a lost card — but Service Canada does not automatically issue a new SIN simply because the number was exposed or stolen. The response depends on whether the SIN was actually misused.
If no fraud has occurred yet
The right steps are monitoring and protection.
- Check credit reports from Equifax and TransUnion for unauthorized activity
- Place a fraud alert on credit files with both bureaus
- Contact the Canadian Anti-Fraud Centre (1-888-495-8501) to report the exposure
- Monitor bank accounts, CRA My Account, and MSCA for unusual activity
- File a police report if theft is suspected
- Contact any institution where the SIN may have been compromised
If fraud has already occurred
If there is evidence that someone used the SIN to obtain employment, credit, or government benefits fraudulently, contact Service Canada directly.
Provide evidence including police report numbers, credit bureau documentation, and a timeline of the suspected misuse. Service Canada will investigate and determine whether a new SIN is warranted.
Can you get a brand-new SIN number?
Only in limited circumstances — and approval is not guaranteed.
Service Canada may issue a new SIN when the applicant provides clear, documented evidence that the existing SIN was used fraudulently and that the fraud is ongoing or its effects cannot be resolved. The evidence bar is high. They would require:
- Police report confirming the identity theft or fraud
- Credit bureau records showing unauthorized accounts or inquiries
- Documentation of attempts to resolve the fraud through existing processes
- A detailed personal statement explaining the timeline and impact
A new SIN is a last resort. Service Canada will first attempt to resolve the issue using the existing number — flagging the SIN in government systems, correcting fraudulent records, and working with the affected institutions.
A person whose SIN was breached in a data leak but who shows no evidence of actual misuse will generally not receive a new number.
What does a new SIN mean for your existing records?
If Service Canada does issue a replacement SIN, the old number is not deleted from history. Government systems can link the old SIN to the new one, so tax records, CPP contributions, and benefit history carry forward.
Service Canada notifies CRA and CPP/QPP when a SIN changes.
The individual must update employers, financial institutions, and other organizations that hold the SIN on file — the same notification process that applies to any SIN change (including the temporary-to-permanent transition after becoming a permanent resident).
Frequently asked questions
Here are some commonly asked questions on this topic:
Does Canada still issue SIN cards?
No. Canada stopped producing plastic SIN cards on March 31, 2014. Since then, new SIN holders receive a Confirmation of SIN — a letter or electronic confirmation containing the nine-digit number. Existing old plastic cards remain valid if someone still has one, but replacements are not available. The SIN itself (the number) is what employers and institutions need, not the physical card. Service Canada's online and in-person services can confirm the existing SIN for anyone who has lost track of it.
Is there a fee to replace or confirm a SIN?
No. All SIN-related services from Service Canada are free, including new applications, record updates, and Confirmation of SIN requests. Any third-party website or service charging a fee for SIN-related assistance is not an official government channel. Online, in-person, and mail applications are all free.
| Method | What to expect |
|---|---|
| Online (Service Canada) | About 5 business days |
| In person (Service Canada Centre) | Can receive during the visit if documents are complete |
| By mail | About 20 business days |
My SIN was in a data breach — do I get a new number?
Not automatically. A data breach exposes the SIN but does not by itself prove that the number was used fraudulently. Service Canada requires documented evidence of actual misuse — not just exposure — before considering a new SIN. The recommended steps after a breach are monitoring credit reports, placing fraud alerts with Equifax and TransUnion, reporting to the Canadian Anti-Fraud Centre, and watching CRA and MSCA accounts for unauthorized activity. If fraud does occur, the evidence collected during monitoring becomes the basis for a new-SIN request.
Can I request a new SIN just because I am worried about identity theft?
No. Concern about potential misuse is not sufficient grounds for a new SIN. Service Canada requires clear evidence that the SIN was actually used fraudulently. Anxiety about a possible future breach — without documented current or past misuse — does not meet the threshold. Protection measures (credit monitoring, fraud alerts, careful sharing of the SIN) are the appropriate response when no fraud has occurred.
How do I find my SIN without the card?
Check previous tax returns, T4 or T5 slips, RRSP or TFSA contribution receipts, your Notice of Assessment from CRA, your CRA My Account, or your My Service Canada Account. All of these display the SIN. If none are accessible, visit a Service Canada Centre in person with valid identity and status documents — the SIN can be confirmed during the visit at no cost.
