Yumi is a project that makes it possible to target investments and social aid in an effective way.Yumi relies on a system of coupons, each relating to a product (good or service) from a supplier and intended for a beneficiary. Deployed in the form of QR-codes, they form the basis of transactions linked to the Yumi service.Agents create beneficiary accounts and supplier accounts participating in the project. They also create the products (goods and services) attached to the accounts payable.They then generate product coupons that they allocate to beneficiaries if necessary according to freely defined criteria and profiles, on an ad hoc basis or within the framework of programs. The coupons allocated are then available in the applications of the beneficiaries concerned.During a transaction, the beneficiary presents the QR-code of the coupon available in his application to the supplier who scans it from his own application.The transaction is then finalized, the coupon consumed and the respective accounts of the beneficiary and the supplier updated.