The Lottery Ticket

No one's watching.

You find a 10,000 euro scratch card on the office floor. You saw who was buying them at lunch. What happens next?

You found a winning scratch card on the floor at work, right by the vending machine. It's worth 10,000 euros. You don't know whose it is, but you saw your colleague Maria buying scratch cards during lunch. She hasn't mentioned anything about winning.