Fake money is a type of object for transactions that you cannot use for real. Even though its form is real, its function is clearly different from real money. Then the right place to use fake money is a game. In the game then you can use it as a transaction tool. In order to use it in the game, you need a type of game that requires money as a tool to play. There are many types of games that implement it. An example is the monopoly game.
The type of paper used in fake play money is certainly different from the real one. Although both are made of paper, the basic materials and types are not the same. You don't need the wordy type of paper. Only with plain paper like the one in the book, you can make your own. In some types of fake money that exist, there are parties that make it as similar as possible to the original version, even the type of paper is closer to the original material. But still, there is always something that makes it different from the original version.
Playing using fake money has become the safest and most appropriate way and activity to do. in real money, you clearly know the value of that money. After all, it's not easy to get real money. You have to work hard for it. It's a shame if only used in games. Of course, you can. However, it would be better if some adjustments were made to the playing rules. For example, after playing, the money must be returned to its original owner.
To design fake play money, you can find many references scattered on the internet. With reference to it, you have a guide for making it the way you want it to fit the game. Not only from the internet but from existing real money, you can also make a reference. The easiest way to get its design is to use a printable available on the internet. You will find a variety of printable files that will fit well with you and you can easily print them using a standard printer in your vicinity.