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In this Comment it is argued that Stishov et al. [Phys. Rev. B 86, 064433(2012)] incorrectly estimated concentrations of (supposed) paramagnetic centerswith \mu_eff = 4.8\mu_B in the investigated CoSi crystals. Correct estimationgives concentrations of such centers from 25 to 50 times smaller than reported(appr. 0.04 to 0.16% instead of appr. 2 to 4%). Also the reported data ontemperature dependence of resistivity \rho(T) of four CoSi crystals prepared indifferent Labs are so close to each other at T = 250 to 300K that it isextremely unlikely to be reproducible for any reasonable accuracy ofresistivity measurements. These and some other problems of the paper arerelated to the key points of the authors argumentation. As a result their mainconclusions become unjustified.

Comment on "Self-doping effects in cobalt silicide CoSi: Electrical, magnetic, elastic, and thermodynamic properties"