The authors have developed a model for explaining the thermally stimulated depolarization current obtained for a ferroelectric 60:40 mol.% VDF/TrFe (vinylidene fluoride-trifluoroethylene) copolymer, combining a slow process with a fast one. Initially the polarization decays slowly due to either the thermal depolarization of dipolar units originating in the beta -phase crystallites or the variation of the pyroelectric current. Subsequently the decay is accelerated and eventually brought to an end by the ferroelectric to paraelectric transition. Results of the measurements could be fitted by a theoretical curve.