Good advice. There are a lot of people (including myself) who do not like to give out their SIN. If you don't need it for Revenue Canada reporting, it is none of your business.

Take care.

>And be aware that there are only a few places where a Canadian has to give his/her SIN (his/her employer, welfare application). Nobody can force you to provide this number.
>
>It is also forbiden to be used in any other purpose than the one for which it was requested. Most of the companies keep this number encrypted in their tables (or upgrade their systems to encrypt it).
>
>So, you cannot use it as a unique key.
>
>Vlad
>
>>In the US, we have social security numbers. Is it true that Canada uses driver's license numbers for unique ID numbers? If so, how long/what format is this number?