Device and a communication processing method

A method of processing a communication for at least one destination terminal, said method comprising: - a step (E100) of receiving a communication to said at least one destination terminal; - a step (E200, E300) for obtaining a non-certified identifier (FROM) of an issuer of said communication, said identifiers being included in a signaling message (M1) of said communication and reliability information (PAI); - a step (E400) of comparing said reliability information (PAI) with said non-certified identifier (FROM); and - a step (E500) for processing the said communication function of the result of said comparing step.