The use of blockchain and smart contracts in the control of raffles and lotteries would be an important contribution in the credibility of the entire process. Due to the attributes of transparency in the use of public and distributed data of the blockchain, implementing a smart contract for the registration of the participants of a raffle, where after the selection process of the winner is published and payment is made automatically and immediate, it grants an effective method for the delivery of the prizes, which makes it attractive for the participants that will have their immediate prize in real time, also, since the data is easy to audit, it grants credibility attributes for the organizers of the raffle, who can publicly display the information of the results. Finally, thanks to the fact that the data is final and immutable, participants can have full confidence in the recording and publication of the results since they will not allow fraud after the draw.