No, there is no such thing as a 4 dollar bill in circulation in the United States or any other country. The smallest denomination of US paper currency is the one dollar bill, and all other denominations are in increments of 5, 10, 20, 50, and 100 dollars.
While there have been instances of novelty or commemorative bills with denominations of 4 dollars or other unusual amounts being produced, these bills are not legal tender and are typically sold as souvenirs or collector’s items.
For example, in 2014, the United States Bureau of Engraving and Printing produced a commemorative bill with a denomination of 2 dollars to celebrate the 150th anniversary of the signing of the Emancipation Proclamation. These bills were sold as collector’s items and were not intended to be used as currency.
Similarly, there have been instances of novelty bills with denominations of 4 dollars being produced as part of games or promotions. For example, in 2007, a company called Four Dollar Bill, LLC produced novelty bills with a denomination of 4 dollars as part of a treasure hunt game. These bills were not intended to be used as currency but were sold as part of the game.
In conclusion, while there is no such thing as a 4 dollar bill in circulation, there have been instances of novelty or commemorative bills with denominations of 4 dollars or other unusual amounts being produced for sale as souvenirs or collector’s items. These bills are not legal tender and cannot be used as currency.