The present invention relates to a remanent olfactory marking method, in particular for tracing individuals who have committed an offense, comprising a step of bringing a liquid or a gel into direct contact with the clothing and / or skin of an individual and / or with an object, for example by aerosolization of the liquid or by spraying of the gel or by bursting of microspheres containing the liquid or the gel, with a view to impregnating the clothing and / or the skin of the individual and / or the object with said liquid or said gel, said liquid or said gel comprising a residual olfactory chemical marker, adapted to allow the olfactory tracing of the individual and / or of the object. The present invention also relates to devices for implementing such a method
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