If you win pch do they just come to your house or do you have to sign something?

I read the PCH Sweepstakes rules, and it says you have to sign something verifying your address, as well as some other info, then fax or mail it back to them within 30 days. THEN they show up in the next few weeks. So all those people who act so surprised.... aren't really surprised at all, except maybe they don't know exactly when the prize patrol is showing up.