The One Chip Rule in poker defines that if a player places one chip into the pot without verbally announcing their decision, their bet will be deemed as a call and not a raise, regardless if their chip is of a higher denomination. It’s also known as an oversized chip rule.
One Chip Rule Poker Example:
If you have to bet $50 to call a bet and you put a $100 chip into the pot without announcing a raise, your bet will be considered a $50 call, not a raise to $100, and the dealer will simply give back $50 to you.