We wish to comment on the paper "Complementarity in Radiochemical and Infrared Spectroscopic Characterization of Electrode Adsorption"" In his article, Wieckowski criticizes two sentences from the introduction to a recent paper of ours, which had to do with an infrared spectroelectrochemical study of anionic adsorption during underpotential deposition (UPD). The author singles out comments made about radiotracer technique, but ignores those made by us about other methods. Additionally, Wieckowski makes no statements whatsoever about our data in ref. 2, nor does he question our interpretation of those data. Furthermore, the author presents no new data, but instead republishes data (and the discussion of those data) from a separate publication.