  The Tolman paradox is well known as a base for demonstrating the causality
violation by faster-than-light signals within special relativity. It is
constructed using a two-way exchange of faster-than-light signals between two
inertial observers who are in a relative motion receding one from another.
Recently a one-way superluminal signalling arrangement was suggested as a
possible construction of a causal paradox. In this note we show that this
suggestion is not correct, and no causality principle violation can occur in
any one-way signalling by the use of faster-than-light particles and signals.
