The process is intrinsically oriented towards overcoming almost all the causes that can lead to the irregular conclusion of a contract based on a series of elements including: the certainty of the signer (biometric signature); identification documents acquired digitally and attached to the contract; end-to-end submission to the back end systems of Acea Energia, thereby eliminating the risk of errors and/or tampering during uploading; automatic and complete sending to the customer of all pre-contractual documents, economic and contractual conditions, both on durable media and on paper, depending on the choice of the customer.