Method for detecting frauds in an electricity supply network comprising a plurality of electricity meters (130, 131, 132, 133, 134, 135, 136, 137, 138, 139) connected to a data concentrator by electricity supply cables, characterised in that the method comprises: obtaining a measurement of global energy E DC consumed in the electricity supply network over a predefined period; making an estimation of total energy E ∑, the total energy E ∑ resulting from the sum of a global intrinsic energy E I g consumed over the predefined period by said plurality of electricity meters, a global measured energy E M g corresponding to a sum of energies measured respectively by the electricity meters during the predefined period and the global wire-loss energy E P g representing energy lost in said electricity supply cables during the predefined period, a procedure for estimating the global wire-loss energy E P g being implemented and comprising: obtaining, from each electricity meter, information representing a distance of said electricity meter with respect to the data concentrator; and making an estimation of the global wire-loss energy E P g using said information representing distances; making a comparison of the measurement of the global energy E DC with the estimation of the total energy E ∑; and detecting fraud according to a result of said comparison, wherein the estimation of the global wire-loss energy E P g using said information representing distances comprises: classifying each electricity meter in a class from a predefined set of classes according to the information representing the distance of said meter, each class being associated with a range of information values representing distances; estimating (32221, 32222, 32223, 32224) a wire-loss energy E P c k for each class k; and calculating the estimation of the global wire-loss energy E P g by adding the wire-loss energies E P c k estimated for each class k. obtaining a measurement of global energy E DC consumed in the electricity supply network over a predefined period; making an estimation of total energy E ∑, the total energy E ∑ resulting from the sum of a global intrinsic energy E I g consumed over the predefined period by said plurality of electricity meters, a global measured energy E M g corresponding to a sum of energies measured respectively by the electricity meters during the predefined period and the global wire-loss energy E P g representing energy lost in said electricity supply cables during the predefined period, a procedure for estimating the global wire-loss energy E P g being implemented and comprising: obtaining, from each electricity meter, information representing a distance of said electricity meter with respect to the data concentrator; and making an estimation of the global wire-loss energy E P g using said information representing distances; making a comparison of the measurement of the global energy E DC with the estimation of the total energy E ∑; and detecting fraud according to a result of said comparison, wherein the estimation of the global wire-loss energy E P g using said information representing distances comprises: classifying each electricity meter in a class from a predefined set of classes according to the information representing the distance of said meter, each class being associated with a range of information values representing distances; estimating (32221, 32222, 32223, 32224) a wire-loss energy E P c k for each class k; and calculating the estimation of the global wire-loss energy E P g by adding the wire-loss energies E P c k estimated for each class k. classifying each electricity meter in a class from a predefined set of classes according to the information representing the distance of said meter, each class being associated with a range of information values representing distances; estimating (32221, 32222, 32223, 32224) a wire-loss energy E P c k for each class k; and calculating the estimation of the global wire-loss energy E P g by adding the wire-loss energies E P c k estimated for each class k.