The two-point scaling approach is introduced by the assumption that the thermodynamic potentials are generalized homogeneous
functions with respect to the reduced temperature variable and to the fields conjugated to the order parameters, however,
the singularities are related to the stability points in contrast to the conventional scaling where the fixed point is identified
with the phase transition temperature.
The extended scaling theory is illustrated in the case of the pyroelectric function behaviour in the neighbourhood of ferro-paraelectric
phase transitions. The method is successfully applied to the description of the melting and surface melting phenomena. Applications
to liquid crystals and mixtures of solvents can be predicted as fruitful but they still remain open for considerations.