It is demonstrated, that the forbidden lines, which were observed in the SEIRA spectra of diprotonated BiPyH22+ and ethylene, adsorbed on Cu, as well as on ethylene, adsorbed on mordenites can be explained on the base of the Dipole-Quadrupole theory of SEIRA and is the consequence of the existence of the strong quadrupole light-molecule interaction. (C) 2012 Elsevier B.V. All rights reserved.