A downhole receptacle for tracer installation, comprises a housing and a tracer material arranged within the housing. The tracer material is water soluble. And the housing has an outer shape that corresponds to an outer shape of a standard gas lift valve. Further a method for the installation of a downhole receptacle for a tracer includes the steps of (a) running completion with at least one side pocket mandrel with or without a pre-installed dummy gas lift valve; and (b) replacing the dummy gas lift valve with a downhole receptacle for a tracer or installing a downhole receptacle into the side pocket mandrel.