This paper presents a technique for processing simultaneous errors in decoupled generalized state estimation via geometric tests considering both models: bus-branch modeling and substation level modeling. Geometric tests are able to compose sets with suspicious information and identify the source of the error without the need for re-estimation. In addition, the purpose of this work covers the processing of errors in measurements for distribution systems, combining geometric tests with decoupled methods. The performance of the proposed methodology was evaluated through simulations involving the IEEE 30-bus transmission system, modeled at the substation level, and a 141-bus distribution system, represented as a bus-branch network, where various combinations of measurement errors and topology are evaluated