The article presents the results of the author’s research on the compliance of public administration personnel with the applicable law in matters related to the service of official documents, as well as the consequences of what is described as a careless attitude on the part of officials who recklessly assess whether the conditions for presuming a document to have been served have been met. The study demonstrates that such an attitude does indeed occur in practice and examines its effects. The focus was mainly on the effects of incorrectly designating the address of correspondence sent to the parties.