This paper presents the Random Neural Network in BlockChain configuration where neurons are gradually incremented as user information increases. The additional neurons codify both the new information to be added to the “neural block” and previous neurons potential to form the “neural chain”. This configuration provides the proposed algorithm the same properties as the BlockChain: security and decentralization with the same validation process: mining the input neurons until the neural network solution is found. The Random Neural Network in BlockChain configuration is applied to a digital documentation application that avoids the use of physical papers. Experimental results are presented with optimistic conclusions; this paper provides a digital step forward to avoid physical currencies, documentation and contracts.