  In extended supersymmetric models with additional singlet Higgs fields
displaced vertices could be observed if the decay width of the next-to-lightest
supersymmetric particle becomes very small due to a singlino dominated LSP. We
study the supersymmetric parameter space where displaced vertices of the second
lightest neutralino exist in the NMSSM and an E6 inspired model. For a mass
difference between LSP and NLSP of more than 10 GeV the singlet vacuum
expectation value has to be at least of the order of 100 TeV in order to obtain
a lightest neutralino with a singlino component large enough for displaced
vertices.
