The deficiency of the administration is meaningful and also ambiguous. Meaningful as it brings back administrative bad memories for every citizen. But ambiguous, for jurists, as the deficiency naturally reminds them of many terms which are very close, such as lethargy or abstention. Nevertheless, the deficiency has to be distinguished from these terms and can be defined as the result of some inactions : the ones which should not have happened. The recognition of the administrative deficiency has thus a function : highlighting an unacceptable passive behaviour. What it means an insufficient use of its means to fulfil its mission and an abusive abstention. So, the abnormal nature of this inaction highlighted by this recognition needs a reaction of the legal system, in order to condemn this noted lack, jurisdictionally or not.