Digitalisation, optimisation and facilitation of transactions and operations between merchants and consumers, economic alternative to receipt papers, ecological and responsible steps against consumption and paper waste… As many challenges the application PocketSlip, created in 2014 by the South African François Liebenberg, answers to. In that end, the digital application, integrating any registering system, saves the spendings of the users on the cloud under the shape of a digital receipt sent by maul on the mobile and web application, cancelling the risk of losing it and facilitating its use for subsequent claims, warrantees, taxes and for accounting. This automated system benefits to merchants that refrain from printing on paper.