Is it illegal to put business cards on car windshields?

In most public areas, tucking a card under a windshield wiper is legal, but private property changes the answer. Malls, office complexes, and gated lots often ban the practice outright, so posted signs are the thing to check before you start. Local anti-littering rules can also come into play if cards blow loose and end up on the ground.

• Public streets and lots: generally allowed, though rules vary by city.
• Private lots (malls, office parks, apartments): frequently prohibited, so read the posted signs.
• Watch anti-littering ordinances. Scattered cards can trigger fines even where placement is allowed.
• Windshield cards get a lukewarm response, so weigh it against handing cards out in person.