How was Santa going to give him that present? Does he sneak coupons into this guy's junk mail? Fake a sweepstakes win? That would never work -- he would absolutely think it was a police trick to bring him into custody.
Actually, why would a real Santa want to cover up his own existence at all? This one needs magic for his sleigh to run. He should be airing commercials about how real he is. Think how many charity organizations would pitch in to spread Santa awareness in a world in which magic is a real thing you can witness. It's as if everyone in a Christmas movie is willfully denying Santa's existence for no reason but to spite wonderment. And that's fine, but then why is nobody concerned when they and their children receive expensive, unmarked presents from a stranger?
New Line Cinema
And another thing: Santa would have a massive, unignorable impact on the economy. Decent kayaks can cost hundreds of dollars, and a "spa day" for a man with that much hair in need of removal could run into the thousands. These are high-market items spread across every non-naughty household in the world. That's billions, maybe trillions of dollars of lost revenue. Wait ... is big business trying to cover up the existence of Santa Claus to protect profits? Is it possible Santa existed in our own universe all along, but Big Christmas killed him with corporate greed? Is that what you were trying to tell us, Will Ferrell and Tim Allen? We're sorry, Will Ferrell and Tim Allen!