when they start working for you has to apply for one and give it to you within three days after they receive it.
The official validation service supported by the W3C is at validator.w3
Note: These SIN and BN validation tests will determine if the submitted number passes the check digit formula for a Canadian Social Insurance Number (SIN) or Business Number (BN).
The problem I have is some users are smart enough to generate a fake SIN that can pass the above validation, but the SIN would not exist in the government database.
Therefore, what I am asking is how I can check the given SIN number is genuine and actually issued by the Canadian Government.
Also, if you report an incorrect SIN on a T4 slip that has a pension adjustment amount, the employee may receive an inaccurate registered retirement savings plan (RRSP) deduction limit statement and the related information on the employee’s notice of assessment will be inaccurate.