[en] The denials, restraints and delays of shipments of radioactive material likely to have occurred and continue to occur. Reducing them to acceptable levels can be a tangible goal that senders and recipients can anticipate and get. The basis for resolving cases of denials and delays should consider not only the participation of the competent national nuclear authorities but also other government authorities. Carriers, shippers, transport companies and recipients should consider in their queries all the wide range of authorities apparently have no involvement but they really have. This paper describes the experience gained in the country of Brazil and provides the basis of a model that could prove useful to other countries and regions, including America, if we adopt and adapt, to reduce the incidence of denials and delays of shipments of radioactive material, according to its own conditions and characteristics