Microsoft doesn't check. ever. They don't care. In fact, most stores only stock the edu versions because othrs are hundreds of dollars.
Apple, OTOH, cares. You can order online without verifying anything, but they peridoically do 'internal audits'. I don't know much about them, but I think if they find you aren't (or weren't) qualified, they won't sell to you w/ the discount anymore.
Timelessblur, what school do you go to?? I paid over $300 for the PC version of MSOffice 2k3.