We comment the Letter 'A novel experimental method: electrochemical detection of phase transition in ferroelectric single crystals', Chem. Phys. Lett. 384 (2004) 262 by K. Gatner and R. Jakubas. We indicate that the method used in this Letter is not 'A novel method' but the application of the method described in Refs. [M. Matlak, M. Pietruszka, E. Rowinski, Phys. Rev. B 63 (2001) 52101; M. Matlak, M. Pietruszka, E. Rowinski, Phys. Stat. Sol. A 184 (2001) 335; W. Gawel, E. Zaleska, Z. Sztuba, Met. Sci. Eng. A 324 (2002) 255], well known to Gainer, but not cited in the commented Letter. Additionally Gainer, cooperating with us, has used our TGS samples and published the results in the commented Letter without our knowledge and permission. (c) 2006 Elsevier B.V. All rights reserved.