Dell's Policies + Processes -- Canada
Why We May Ask for Your Social Insurance Number?

If your choice of payment for a Dell product is by way of leasing, we will ask for your Social Insurance Number (SIN). This is requested so that we can provide your information to a credit bureau in order to perform a credit analysis. The SIN is the best way to ensure that the information we are provided actually refers to you. This will avoid us making incorrect conclusions about your financial status. However, you should be aware that [COLOR]using your SIN in this manner is voluntary and you have the right to refuse to provide it to us[/COLOR].
Dell's Online Policies -- USA
Dell only asks for specific types of personal information
Information we may request includes your name, e-mail address, phone number, address, type of business, credit card details, customer preference information, customer number and service tag number, as well as other similar personal information. Should you choose to apply for credit through our financial service providers, [COLOR]we may also ask for your social security number and other information to process your credit request[/COLOR]. If we ever ask for significantly different information we will inform you.
Check out those policies ... But as you can see you can either give it to them or refuse ....