If you gave your Social Insurance Number to a fake employer, act within days, not weeks: report the scam to the Canadian Anti-Fraud Centre and your local police, ask Equifax and TransUnion Canada to flag your credit file, and check your CRA and My Service Canada accounts for changes you didn’t make. Service Canada won’t issue a new SIN just because yours was exposed – only when there is proof it was misused. Here is the order to work through.
When a real employer needs your SIN
A legitimate employer needs your SIN for payroll – to report your income and deduct tax, CPP and EI. The CRA’s rule is that you give it to your employer within three days of starting work. That means a real employer asks for it after you have accepted a written offer, usually in an onboarding form, not in a job ad, a chat interview or a “registration” step.
| Stage | Should you give your SIN? |
|---|---|
| Job ad, application form, resume | No |
| Interview (any format) | No |
| Background check | Normally not needed – ask why if requested |
| After accepting a written offer, for payroll | Yes, through the employer’s onboarding or HR system |
Asking for a SIN before an offer is one of the warning signs listed in our guide to remote job scams in Canada.
The first steps, in order
- Stop contact and don’t send anything more. No further documents, no codes sent to your phone, no payments.
- Save the evidence: screenshots of the ad, chat or emails, phone numbers, usernames, website addresses, and a list of what you shared.
- Report to the Canadian Anti-Fraud Centre online or at 1-888-495-8501.
- Report to your local police and write down the file number. Banks, credit bureaus and government offices may ask for it.
- Contact Equifax Canada and TransUnion Canada. Ask each to add a fraud alert to your credit file, so lenders take extra steps to verify your identity before opening credit. Check your credit report with both for accounts or inquiries you don’t recognise.
- Check your government accounts: in CRA My Account, look at your address, direct deposit details and tax slips; in My Service Canada Account, look for Employment Insurance claims or changes you didn’t make.
Beware of the second scam: after a fraud, victims are often contacted by “recovery agents”, fake police officers or fake government staff who promise help for a fee or ask you to “verify” your SIN. Government agencies don’t ask for your SIN by text or email. Hang up and call the official number yourself.
What to do depending on what you shared
| You shared | Extra steps |
|---|---|
| SIN only | Credit bureau fraud alerts, watch your CRA and Service Canada accounts and your credit reports for the next months |
| SIN plus photo ID (licence, passport) | All of the above; report the ID document to the issuer – your provincial licensing office for a licence, the Government of Canada passport service for a passport |
| Bank details or a void cheque | Call your bank’s fraud line; ask about blocking the account or changing numbers |
| Online banking login or a one-time code | Call your bank immediately, change passwords, turn on two-factor authentication everywhere |
| Email password | Change it, sign out of all devices, check forwarding rules – your email resets every other password |
What Service Canada can and can’t do
Many people expect to get a new SIN. The Government of Canada’s guidance on SIN fraud says otherwise:
- The SIN Program does not issue a new number just because yours was exposed or shared. It needs proof that your SIN was actually used to commit fraud.
- Even then, a new SIN is not always the best option: your old number stays in the records of banks and agencies, and having two numbers can cause new problems.
- You don’t have to report a suspected exposure to the SIN Program itself. If your SIN was used to claim government benefits, report it to the program concerned – for example, Employment Insurance – so payments can be stopped.
- Service Canada can’t correct your credit file. That’s why the credit bureau steps above matter.
Signs that your SIN is being misused
- A CRA notice of reassessment for income from an employer you never worked for.
- A tax slip (T4) from an unknown employer, or a change of address in CRA My Account you didn’t make.
- Credit cards, loans or phone contracts on your credit report that aren’t yours.
- A letter about an EI claim you didn’t file.
If you see any of these, contact the agency or lender concerned, give them your police file number, and keep a written log of every call: date, person, what was agreed.
How to protect yourself in future job searches
- Keep your SIN, date of birth and full address off your resume.
- Give your SIN only after a written offer you’ve accepted, through the employer’s own HR system.
- Check that the employer and the recruiter are real – our article on how to verify a recruiter in Canada takes about ten minutes.
- Learn how legitimate background checks work, so a fake “clearance” step stands out.
Common questions
Can someone work under my SIN?
Yes, that happens: someone may use your number to get paid by an employer. It often shows up as unexpected income on your CRA account. Report it to the CRA and keep the police file number.
Should I get a new SIN?
Only with proof that your SIN was used fraudulently, and even then the Government of Canada notes that a new number is not always recommended. Credit fraud alerts and account monitoring are the main protection.
Is it safe to give my SIN to a recruiter?
A recruiter or staffing agency doesn’t need your SIN to submit your application. Give it only to the actual employer or agency payroll after you’ve accepted an offer.
Do credit fraud alerts cost money?
Ask each bureau directly – the options and any fees for ongoing monitoring products differ. A basic fraud alert on your file is the step to ask for first.
More on this topic: our guide Remote Job Scams in Canada: 12 Warning Signs and What to Do puts this article in context.
