Although Zeffy supports raffle forms, it's important to know that Zeffy is not a licensed Electronic Raffle System, because we currently do not offer a service for drawing a winner. Conducting an online draw requires a specific license and we do not hold such a license at this time.
However, Zeffy can still be used to collect payments online and generate ticket numbers. We recommend checking with your local gaming authority to ensure that Zeffy's electronic tickets comply with their regulations. If not, you may have to generate raffle tickets outside of Zeffy. Your local gaming authority is the best resource to answer questions specific to applicable raffle laws.
For drawing the winning number, you have a couple of options. You can export the list of all purchased tickets and use an external drawing service, such as a random number generator, or you can manually draw a winning number, depending on what is required by your local gaming authority. You'll find more information and helpful tips about that here : Drawing a winner for your raffle